TW202033989A - Blue edge filter lens - Google Patents

Abstract

The present invention relates to an optical lens with an improved blue edge filter and to the prevention of age-related macular degeneration (AMD). The distinctive but cosmetically unacceptable yellow color of blue edge filter lenses is masked by at least one masking dye. Preferably, the optical lens of the invention protects the eye from damaging blue light and also from UV radiation. The blue edge filter lens does not have any negative impact on the human circadian rhythm.

Description

Blue edge filter lens

Invention field The present invention relates to manufacturing an optical lens with a blue edge filter. The present invention also relates to the prevention of age-related macular degeneration (AMD).

Background of the invention Damage to the macula of the eye has several causes. One factor is the influence of blue light. Therefore, the macula needs blue light protection.

The eyes contain lutein and zeaxanthin that absorb blue light. Lack of lutein and/or zeaxanthin increases the risk of macular damage (see "Effects of macular carotenoid supplementation on visual performance, sleep quality, and adverse physical symptoms in those with high screen time exposure" by Stringham et al., published in Foods In 2017).

The optical lens with blue edge filter protects human eyes from harmful blue light. US 9,885,885 discloses a blue edge filter optical lens that substantially transmits blue light greater than 450 nm.

Some commercially available light sources emit large amounts of light at 455 nm. Therefore, the known blue edge filter optical lens that transmits blue light greater than 450 nm cannot provide sufficient protection for devices that emit blue light at 455 nm. In addition, commercially available blue edge filter optical lenses have an aesthetically unacceptable yellow color, often a lemon color.

Therefore, there is a need for a new blue edge filter lens that provides better protection against damaging blue light and/or does not have an aesthetically unacceptable yellow color.

Summary of the invention Lenses that absorb blue light up to 460 nm (rather than only 450 nm at most) provide better protection from damaging blue light. However, such lenses are known to cause undesired fatigue. Therefore, a new blue edge filter lens is needed, — It provides better protection from damaging blue light, and — It does not cause unwanted fatigue, and — It does not have an aesthetically unacceptable yellow color.

This problem is solved by providing a blue edge filter lens, — The lens has an edge at 460 nm, and — It allows partial transmission of blue light with a wavelength of approximately 480 nm +/-15 nm, and — Shade its yellow.

Fatigue is related to the circadian rhythm of the human body. This rhythm is regulated by the secretion of melatonin. Melanopsin, which prevents the secretion of melatonin, has a peak spectral sensitivity of approximately 480 nm. Blocking light with a wavelength of 480 nm triggers a higher than normal secretion of melatonin during the day. Partially transmits blue light with a wavelength of approximately 480 nm +/- 15 nm to prevent unwanted fatigue.

We can think of two types of blue edge filter lenses: blue edge filter lenses suitable for making sunglasses (also known as dark lenses), and blue ones intended for continuous daily use regardless of weather conditions Color edge filter lens (that is, light color lens).

The blue edge filter lens intended for such continuous use should be suitable for night driving. Therefore, a new blue edge filter lens is needed, — It does not cause unwanted fatigue, and — It provides better protection from damaging blue light, and — It does not have an aesthetically unacceptable yellow color, and — It is suitable for night driving.

This problem is solved by providing a blue edge filter lens, which allows partial transmission of blue light with a wavelength of about 480 nm+/-15 nm, and which has an edge under 460 nm, and which blocks its yellow color, And — it has a light transmission factor T _{ν of} at least 75% and meets other relevant regulations/legal requirements.

Glasses should not impair (impair) traffic signal detection. This also applies to relatively dark sunglasses. Otherwise, you cannot wear such glasses while driving. Therefore, a new blue edge filter lens is needed, — It provides better protection from damaging blue light, and — It provides protection from UV light and the brightness of visible light, and — It does not impair traffic signal detection, and — It does not have an aesthetically unacceptable yellow color.

This problem is solved by providing a blue edge filter lens, — The lens has an edge at 460 nm, and — It absorbs UV at 380 nm and/or 400 nm and it belongs to filter category 2 or 3, and — It has a relative visual attenuation quotient Q according to applicable regulations/laws, and — Shade its yellow.

Lenses of filter category 2 or 3 have a certain degree of darkness, as known from commercially available sunglasses. Sunglasses should only be used in fine weather. Therefore, undesired fatigue due to melatonin secretion is not a major problem with sunglasses.

The present invention also relates to the use of a dispersion liquid, which contains red, green and/or blue dyes for shielding the yellow color of the blue edge filter lens.

In order to color the optical lens, the lens is immersed in an aqueous dye dispersion liquid. According to the present invention, a blue edge filter lens with an aesthetically acceptable color is obtained by immersing the lens in at least two aqueous dye dispersions. An aqueous dye dispersion contains a lens for damaging blue light. A yellow dye dispersion for filtering light. Another aqueous dispersion contains at least one shading dye for shading the unacceptable lemon color of the lens.

Unexpectedly, better results are achieved when the lens to be dyed is first immersed in the aqueous yellow dye dispersion. The yellow lens thus obtained is then immersed in at least one aqueous shading dye dispersion to shade the aesthetically unacceptable lemon color.

If the reverse order is used (that is, first immersion in the shading dye and then immersion in the yellow dye), a speckled lens is obtained instead of a uniformly colored lens. Lenses with spots have irregular, random color distribution and are therefore not suitable for sale. In addition, if the lighter yellow dye is applied before the darker shading dye is applied, the coloring process can be more easily controlled.

Coloring an optical lens is a craft in itself. The parameters that affect the color of the lens (and therefore the absorption of the lens) include the immersion time (that is, the duration of the immersion) and the concentration of the dye in the aqueous dye dispersion. Coloring according to strict standard operating procedures (SOP) often fails, because the immersion time must be suitable for the decreasing concentration of the dye in the aqueous dye dispersion. The concentration decreases over time because each colored lens "consumes" a certain amount of dye. Therefore, even nowadays, lenses are often manually colored under visual inspection. Industrial workers who perform such manual coloring require well-trained color perception. The manufacturing method of the present invention allows the required visual control.

Therefore, the present invention also relates to a manufacturing method in which the undyed lens [provided in step a)] is immersed in the yellow dye dispersion before being immersed in the shading dye dispersion [step c)] [step b) ]. The transmission curve of the lens thus obtained can be measured at any suitable time. Under the condition that the obtained lens still has an aesthetically unacceptable yellow color and/or transmits more light than required, step a) and/or step b) can be repeated to obtain a lens with desired properties.

The dye should then be fixed. In the case where the lens contains or consists of at least one organic polymer, the fixing is performed by heating the colored lens to a certain temperature for a certain period of time. Unexpectedly, if the temperature from 110°C to 125°C is applied for 15 minutes to 25 minutes, the dye fixing of the blue edge filter lens of the present invention is more effective.

The present invention also relates to the prevention of age-related macular degeneration (AMD). According to the present invention, the macular damage is prevented by blocking blue light in the following two situations: in front of the eye and in the eye. Such a dual approach is achieved by wearing glasses with blue edge filter lenses and by ingesting dietary supplements containing lutein and/or zeaxanthin. Therefore, a kit containing the glasses of the present invention and the dietary supplement of the present invention is provided to consumers. Preferably, such kits are provided to consumers whose macular pigment optical density is lower than average.

Detailed description of preferred embodiments The blue edge filter lens of the present invention is preferably an optical lens. Due to the shading dye, the blue edge filter lens does not have an aesthetically unacceptable yellow color. definition

Opticians use "optical lenses" to make glasses. Glasses containing only one lens are called monocles. In most cases, glasses have two lenses. The lens of the present invention is preferably an optical lens, which preferably contains or consists of at least one organic polymer such as polycarbonate or polyurethane.

By convention, the three primary colors are red, green and blue. If all three primary colors are displayed, the result is white. When red and green are combined, the result is yellow. In the context of the present invention, the term "yellow dye" refers to a dye that at least partially absorbs the damaging blue light.

In the context of the present invention, "damaging blue light" is blue light having a wavelength of 460 nm or less. Light with a wavelength from 465 nm to 495 nm is called "good blue light" because it is involved in the regulation of the human body's circadian rhythm.

"Transmittance" is the fraction of incident light or other radiation that passes through a substance at a specific wavelength. In the context of the present invention, it is generally the fraction of the original incident radiation (such as light) passing through the lens at a specific wavelength. It can be expressed as a decimal or a percentage. If the transmission is plotted against a series of wavelengths, a transmission curve will be produced.

In the context of the present invention, "absorb" and "absorb" should be understood in a broad manner and refer to incident light or other radiation that does not pass through a substance at a specific wavelength. Expressions such as "absorb at 380 nm" are used synonymously with expressions such as "absorb radiation with a wavelength of 380 nm".

The transmission curve of the edge filter exhibits a steep slope called the edge at a certain wavelength. The "blue edge filter lens" absorbs blue light while allowing the transmission of light exceeding a certain minimum wavelength. Most known blue-edge optical lenses have edges at 450 nm, that is, they allow a large amount of light with wavelengths greater than 450 nm to be transmitted.

Sunglasses protect the eyes from UV radiation and to a certain extent from the brightness of visible light. The term "visible light" preferably refers to radiation having a wavelength from 380 nm to 780 nm. The more visible light the lens absorbs, the darker the lens. In the context of the present invention, the expression "filter type" refers to one of the five filter types (see Table 1). The five categories are used to classify the darkness of the lens. Descriptive label Filter category Light transmission factor T _ν Remarks Light glasses 0 T _ν > 80% Suitable for night driving Fashion glasses 1 43%> T _ν ≤ 80% For night driving, the lens must have a light transmission factor T _{ν of} at least 75%. Universal sunglasses 2 18%> T _ν ≤ 43% 3 8%> T _ν ≤ 18% Dark sunglasses Dark special sunglasses 4 3%> T _ν ≤ 8% For daytime driving, the lens must have a light transmission factor T _{ν of} at least 8%. Therefore, a lens with filter category 4 may not usually be worn while driving. Table 1

"Light transmission factor T _ν "represents the influence of the filter on a range of wavelengths (for example, from 380 nm to 780 nm). In the context of the present invention, the light transmission factor T _{ν is} preferably the total transmission of the lens when the lens is exposed to a standard light source. The standard light source is preferably a standard illuminating body D65 as determined by the International Commission of Illumination (CIE); it replicates the daylight source. T _{ν is} preferably measured according to DIN EN ISO 123 12-1.

In a preferred embodiment of the present invention, the blue edge filter lens is suitable for night driving. In the context of the present invention, "suitable for night driving" means: 1. The lens belongs to filter category 0 and/or has a light transmission factor T _{ν of} at least 75%; and 2. For wavelengths between 650 nm, the transmittance of the lens is not less than 0.20 of the light transmission factor T _ν , preferably not less than 0.19; and 3. The relative visual attenuation quotient Q of the lens is not less than 0.80 for red traffic lights and not less than 0.80 for blue traffic lights. Less than 0.70, and not less than 0.60 for yellow and green signal lamps, where the relative spectral distribution of the radiation emitted by incandescent signal lamps is applied in accordance with AS/NZS 1067.2, Article 7.8.

Item 3 of the above list is related to traffic signal detection. In the context of the present invention, the blue edge filter lens that "does not impair traffic signal detection" has a relative visual attenuation quotient Q, which is not less than 0.80 for red traffic lights and not less than 0.70 for blue traffic lights. For yellow and green signal lamps not less than 0.60, the relative spectral distribution of the radiation emitted by incandescent signal lamps is applied in accordance with AS/NZS 1067.2, Article 7.8.

Most transparent lenses absorb some UV radiation, especially UV radiation at wavelengths shorter than 290 nm. For UV absorption at longer wavelengths, the lens is treated with a UV absorbing composition. According to European standard EN 1836:2005, if the transmission does not exceed 5% of the light at 380 nm, the lens provides UV protection. In some countries (such as the United States), transmission protection from radiation up to 400 nm ("UV400") is required.

In the context of the present invention, the term "blue edge filter lens suitable for manufacturing sunglasses" refers to a processed lens of filter category 0, 1, 2, 3 or 4, which is better than a lens made of the same material Untreated lenses absorb more UV radiation.

The vast majority of plastic lenses are dip dyed: the lens is placed in a hot liquid and the dye penetrates the surface (sometimes up to a depth of about 1 mm) to produce a uniform appearance. Liquids used to dye spectacle lenses usually contain particles. Therefore, the liquids may need to be stirred when the lens is submerged. The term "dispersion liquid" as used in the context of the present invention preferably refers to a liquid containing undissolved particles. In a less preferred embodiment, all particles will be dissolved, that is, the dispersion of the present invention is a solution.

"Set" refers to a collection of at least two different items. Although the items are different, their purpose is the same. In the context of the present invention, the unified aim is to prevent age-related macular degeneration (AMD). Method of manufacturing blue edge filter lens

The present invention relates to a method of manufacturing a blue edge filter lens. The method includes the following steps: a) Provide an undyed lens which contains or consists of at least one organic polymer, b) Immerse the lens of step a) in an aqueous yellow dye dispersion, and c) shading the yellow color of the lens obtained in step b) at least partially by immersing the lens obtained in step b) in an aqueous shading dye dispersion, Wherein the duration of step b) is preferably at least 20 minutes, and The lens obtained in step b) is preferably cleaned before performing step c).

The lens obtained in step c) should have an aesthetically acceptable color, that is, the undesired yellow color should be sufficiently shielded. If this is not the case, the lens obtained in step c) can be immersed in the aqueous shading dye dispersion of step c) for one second.

Preferably, the transmittance of the lens obtained in step b) and/or step c) is measured. Although the entire transmittance curve can be measured, it is sufficient to measure only the transmittance at 460 nm. In order to better prevent undesirable blue light, the lens preferably transmits less than 6% of incident light with a wavelength of 460 nm. Under the condition that the lens obtained in step b) transmits at a wavelength exceeding the desired wavelength, the lens can be immersed in the aqueous yellow dye dispersion of step b) for a second time. For many yellow dye, relatively low molar extinction coefficient at 460 nm, which can be applied by immersion in a long time to some extent be compensated for (see Beer - Lambert law (Beer Lambert law) principle).

The transmittance of the blue edge filter lens of the present invention at 490 nm is preferably at least 5 times higher than the transmittance of the same blue edge filter lens at 460 nm, and more preferably at least 6 times higher. Therefore, it is preferable to measure the transmittance at least at 460 nm and at 490 nm. When the lens obtained in step c) does not meet this requirement, appropriate measures need to be taken. For example, if the transmittance at 460 nm is higher than the desired transmittance, a shading dye with a non-zero mol extinction coefficient at 460 nm can be used to reduce the transmittance at that wavelength. Similarly, if the transmittance at 470 nm, 480 nm or 490 nm is lower than the desired transmittance, yellow dyes with particularly low molar extinction coefficients at these wavelengths can be used to reduce the absorption at these wavelengths And/or immerse the yellow-shading lens in the aqueous shading dye dispersion for a short time. The latter will reduce the darkness of the lens, that is, reduce the type of filter.

The method of the present invention may include other steps, such as providing an anti-reflective coating and/or a hard coating to the blue edge filter lens and/or activating the undyed lens before step b).

In some embodiments of the present invention, step c) is split into multiple steps, that is, the lens obtained in step b) can be immersed in more than one aqueous shading dye dispersion. When blue edge filter lenses that provide specific UV protection are to be manufactured, additional dispersions can be used. Therefore, the method of the present invention is preferably a method of manufacturing a blue edge filter lens with a UV filter.

The dye dispersion contains molecules that provide color to the lens. Generally, when the coloring process of the present invention is applied, the molecules migrate 0.1 mm or more into the organic polymer of the lens. The exact penetration depth depends in particular on the duration of step b) and the temperature of the aqueous yellow dye dispersion. The duration of step b) is preferably 20 minutes to 120 minutes, more preferably 30 minutes to 100 minutes, and most preferably 40 minutes to 90 minutes, wherein the temperature of the aqueous yellow dye dispersion is preferably 50°C To 150°C, more preferably 60°C to 130°C, and most preferably 80°C to 110°C.

Dyes that can be used in the method of the present invention can be purchased, for example, from Cerium Optical Products (Kent, UK) or from Brain Power International Ltd (Warwickshire, England). The preferred yellow dye is N-[4-(2-hydroxy-5-methylphenylazo)phenyl]acetamide, also known as Disperse Yellow 3. Preferably, the yellow dye dispersion used in step b) contains Disperse Yellow 3.

Therefore, a preferred embodiment of the present invention relates to a method of manufacturing a blue edge filter lens, and the method includes the following steps: a) Provide an undyed lens which contains or consists of at least one organic polymer, b) Immerse the lens of step a) in an aqueous liquid containing Disperse Yellow 3, and c) shading the yellow color of the lens obtained in step b) at least partially by immersing the lens obtained in step b) in an aqueous shading dye dispersion, The duration of step b) is preferably 40 minutes to 90 minutes, and/or The temperature of the aqueous liquid containing Disperse Yellow 3 is preferably 80°C to 110°C, and The lens obtained in step b) is preferably cleaned before performing step c), and optionally If the lens obtained in step c) has an aesthetically unacceptable color, the lens obtained in step c) is immersed in the aqueous shading dye dispersion of step c) for at least a second time.

Any dye capable of masking yellow (for example, the color of Disperse Yellow 3) can be used as a masking dye. Preferred shading dyes are commercially available from Cerium Optical Products (Kent, UK) and sold under the brands Cactus 1.6, Laurel, Pink 2, Green, Marron, Red, Grey, Midnight and Special Brown. In a preferred embodiment of the present invention, the aqueous shading dye dispersion contains at least one compound that at least partially absorbs UV radiation.

In order to fix the dye, the dyed lens is preferably heated. Any commercially available oven can be used for this purpose. Generally, a temperature of 80°C to 150°C, preferably 100°C to 140°C, and optimally 110°C to 130°C is used. If the dye is improperly fixed, the lens is likely to change color. Due to, for example, UV exposure, such discoloration occurs during subsequent manufacturing steps (such as providing an anti-reflective coating) and/or during daily use. Unexpectedly, if a relatively high temperature is applied for a relatively short period of time, the fixation is particularly effective. Preferably, a temperature of 110°C to 130°C (more preferably 110°C to 125°C) is applied for 15 minutes to 25 minutes. In the preferred embodiment, a temperature of 120°C is applied during 25 minutes for fixing the dye.

If the undyed lens contains or consists of at least one thermosetting polymer, the fixation of the dye is particularly effective. Such polymers are commercially available. Preferably, the undyed lens contains at least one polyurethane (e.g. resin MR8 from Mitsui Chemicals) and/or preferably allyl diethylene glycol carbonate (e.g. CR-39 , Or consist of at least one polycarbonate, also known as Columbia resin.

WO 90/05207 discloses equipment suitable for implementing the method of the present invention. The document also discloses the structure of CR-39 and other organic polymers that can be used to make the undyed lens of the present invention (WO 90/05207, page 7, lines 17-29). In addition, it discloses the composition of a preferred dye dispersion (WO 90/05287, page 7, line 30 to page 8, line 14).

Therefore, a preferred embodiment of the present invention relates to a method of manufacturing a blue edge filter lens, and the method includes the following steps: a) Provide an undyed lens, the lens comprising at least one polyurethane or at least one polycarbonate or consisting of at least one polyurethane or at least one polycarbonate, b) Immerse the lens of step a) in an aqueous liquid containing Disperse Yellow 3, and c) at least partially mask the yellow color of the lens obtained in step b) by immersing the lens obtained in step b) in an aqueous shading dye dispersion, and d) heating the lens obtained in step c) to a temperature of preferably at least 100°C, more preferably at least 110°C, preferably for 15 minutes to 25 minutes, The duration of step b) is preferably 40 minutes to 90 minutes, and/or The temperature of the aqueous liquid containing Disperse Yellow 3 is preferably 80°C to 110°C, and The lens obtained in step b) is preferably cleaned before performing step c), and The lens obtained in step c) is preferably cleaned before performing step d).

In one embodiment of the present invention, the blue edge filter lens also provides UV protection. Therefore, the present invention also relates to a method of manufacturing a blue edge filter lens that also provides UV protection. The method includes the following steps: a) Provide an undyed lens which contains or consists of at least one organic polymer, b) Immerse the lens of step a) in an aqueous yellow dye dispersion, and c) shading the yellow color of the lens obtained in step b) at least partially by immersing the lens obtained in step b) in an aqueous shading dye dispersion, The shading dye contains at least one compound that at least partially absorbs UV light.

The method of manufacturing a blue edge filter lens described herein is preferably a method of manufacturing an optical blue edge filter lens. Blue edge filter lens

The edge of the blue edge filter lens of the present invention is preferably under 460 nm (that is, not under 450 nm). Therefore, the transmittance of the blue edge filter lens of the present invention at 490 nm is preferably at least 5 times higher than the transmittance of the same blue edge filter lens at 460 nm, and more preferably at least 6 times higher . In this embodiment, the transmittance of the lens at 460 nm is preferably less than 6%, more preferably less than 5%.

For the blue edge filter lens of filter category 0 or 1 (that is, light color), the transmittance of the lens at 490 nm is preferably at least 29%, more preferably at least 35% and the best The ground is at least 40%, and the transmittance of the lens at 490 nm is preferably at least 5 times higher than the transmittance of the same blue edge filter lens at 460 nm, and more preferably at least 6 times higher.

In one embodiment of the present invention, the blue edge filter lens provides triple protection: protection from UV radiation, protection from damaging blue light, and protection from the brightness of visible light. In order to provide good UV protection to the lens, the lens may be immersed in a suitable commercial product, such as "Shades UV 400 nm Clear" available from Cerium Optical Products (Tantden, Kent, TN30 7DE).

The blue edge filter lens that provides triple protection is usually of filter category 2, 3 or 4 (that is, it looks as dark as sunglasses). Therefore, when observing its transmittance curve, the edge is not as steep as the edge of the blue edge filter lens of filter category 0 or 1.

In one embodiment, the blue edge filter lens of the present invention transmits less than 6%, preferably less than 5%, of light having a wavelength of 460 nm, and the blue edge filter lens transmits at 490 nm The transmittance is preferably at least 5 times higher than the transmittance at 460 nm, and more preferably at least 6 times higher.

In another embodiment, the blue edge filter lens of the present invention transmits less than 6%, preferably less than 5%, of light having a wavelength of 460 nm, and the blue edge filter lens is less than 490 nm. The transmittance is preferably at least 29%, more preferably at least 35%, and most preferably at least 40%.

In another embodiment, the blue edge filter lens of the present invention is suitable for night driving and transmits less than 6%, preferably less than 5% of light having a wavelength of 460 nm, and the blue edge filter lens The transmittance at 490 nm is preferably at least 5 times higher than the transmittance at 460 nm, and more preferably at least 6 times higher.

In yet another embodiment, the blue edge filter lens of the present invention does not impair traffic signal detection and transmits less than 6%, preferably less than 5%, of light with a wavelength of 460 nm, and the blue edge filter The transmittance of the sheet lens at 490 nm is preferably at least 5 times higher than the transmittance at 460 nm, and more preferably at least 6 times higher.

In yet another embodiment, the blue edge filter lens of the present invention transmits less than 6%, preferably less than 5% of light having a wavelength of 460 nm and transmits less than 1% of UV light having a wavelength of 380 nm and transmits Less than 1% of UV light having a wavelength of 400 nm, and the transmittance of the blue edge filter lens at 490 nm is preferably at least 29%, more preferably at least 35% and most preferably at least 40 %, and the blue edge filter lens.

Table 2 lists other preferred embodiments of the present invention (numbered from #1 to #7). In each of these embodiments, the transmittance of the respective lens at 490 nm is preferably at least 5 times higher than the transmittance of the same lens at 460 nm, and more preferably at least 6 times higher. # Filter category Transmittance at 450 nm Transmittance at 460 nm Transmittance at 470 nm Transmittance at 480 nm Transmittance at 490 nm 1 0 Less than 3%, preferably less than 2.5% Less than 6%, preferably less than 5% More than 8%, preferably more than 10% and best more than 12% More than 10%, preferably more than 15% and best more than 20% More than 20%, preferably more than 30% and best more than 40% 2 1 Less than 3%, preferably less than 2.5% Less than 6%, preferably less than 5% More than 8%, preferably more than 10% and best more than 12% More than 10%, preferably more than 15% and best more than 20% More than 20%, preferably more than 30% and best more than 40% 3 1 Less than 3% Less than 6% More than 10% More than 20% More than 40% 4 2 Less than 2%, preferably less than 1% Less than 3%, preferably less than 2.5% Greater than 3%, preferably greater than 4% Greater than 6%, preferably greater than 8% Greater than 10%, preferably greater than 13% 5 2 less than 1% Less than 2.5% More than 4% Greater than 8% Greater than 13% 6 3 Less than 3%, preferably less than 2% and most preferably less than 1% Less than 2%, preferably less than 1.4% Greater than 2%, preferably greater than 2.5% Greater than 3%, preferably greater than 4% Greater than 6%, preferably greater than 7% 7 3 less than 1% Less than 1.4% Greater than 2.5% More than 4% Greater than 7% Table 2

The blue edge filter lens of the present invention is preferably obtained by the method of the present invention. Therefore, the blue edge filter lens of the present invention is preferably an optical blue edge filter lens.

Although not wishing to be bound by theory, it is believed that the yellow dye migrates into the organic polymer of the lens to occupy some of the "blank spots" of the polymer. In subsequent steps, the shading dye then migrates into the organic polymer of the lens to occupy their "blank spots" that are still available. The distribution of the at least two dyes in the organic polymer thus obtained is then fixed by the heating step described herein. Unexpectedly, uniformly colored lenses are obtained when the yellow dye first migrates into the organic polymer. In contrast, if the coloring process starts with the shading dye, the distribution of the dye in the outer part of the polymer is such that a lens with random spots is obtained. Lenses with spots are useless and cannot be sold.

Therefore, the present invention relates to a blue edge filter lens preferably obtained by a method including the following steps: a) Provide an undyed lens, the lens comprising at least one polyurethane or at least one polycarbonate or consisting of at least one polyurethane or at least one polycarbonate, b) Immerse the lens of step a) in an aqueous yellow dye dispersion, and c) at least partially mask the yellow color of the lens obtained in step b) by immersing the lens obtained in step b) in an aqueous shading dye dispersion, and d) heating the lens obtained in step c) for fixing the dye, The yellow dye at least partially absorbs blue light.

Preferably, yellow dye is applied so that the dyed (that is, colored) lens transmits less than 6% of incident light with a wavelength of 460 nm. For the first lens in the production series, this can be easily checked by using a spectrophotometer. For subsequent lenses, the first lens can be used as a visual reference.

Those familiar with the art can then find a suitable aqueous shading dye dispersion, which uses commercially available dyes or a mixture of commercially available dyes. In fact, the tone of the last lens is mainly a matter of personal choice. Some customers prefer green tones, while others prefer more orange tones.

The aqueous shading dye dispersion of the present invention may contain only one dye or more than one dye. Suitable dyes are commercially available and are usually brown, red or green dyes. Prevention of age-related macular degeneration (AMD)

Similar to the lutein and/or zeaxanthin of the eye, the blue edge filter lens of the present invention protects the eye from damaging blue light. Therefore, in order to prevent AMD in the most effective way, the use of the blue edge filter lens of the present invention is combined with the intake of lutein and/or zeaxanthin.

If the optical density of the macular pigment is lower than the average, the intake of lutein and/or zeaxanthin is particularly meaningful. To measure the optical density of the macular pigment, the MPS II Macular Pigment Sieving System (Elektron Eye Technology, Cambridge, UK) can be used.

In one embodiment, the present invention relates to a kit comprising glasses and at least one dietary supplement, wherein the dietary supplement contains lutein and/or zeaxanthin, and wherein the glasses contain at least one blue according to the present invention. Color edge filter lens.

In another embodiment of the present invention, the set includes glasses with two blue-edge filter lenses and a package booklet that recommends oral administration of lutein and/or zeaxanthin. In this embodiment, the blue edge filter lenses are preferably blue edge filter lenses according to the present invention.

In another embodiment of the present invention, the kit includes a dietary supplement and a package booklet, wherein the package booklet recommends wearing glasses to protect the eyes from damaging blue light protection. In this embodiment, the dietary supplement preferably includes lutein and/or zeaxanthin.

Figure 1 shows the transmission curve (T _ν = 73.7%) of category 1 blue edge filter lens. At 460 nm, the transmittance of the lens is 5.8%. At 490 nm, the transmittance is 7.5 times higher (43.9%). The lens provides UV protection (transmittance at 380 nm: 0.1%; transmission at 400 nm: 0%). The relative visual attenuation quotient Q of the lens is 1.09 for red traffic lights, 0.85 for blue traffic lights, 1.07 for yellow traffic lights, and 0.98 for green traffic lights. Therefore, the lens does not impair traffic signal detection.

Similar to the previous figure, Figure 2 also shows the transmission curve of the category 1 blue edge filter lens (T _ν = 74.9%). However, the edges are less steep. At 490 nm, the transmittance is only 29%. Therefore, it is expected that the lens of FIG. 2 has a higher influence on the circadian rhythm of the human body than the lens of FIG. 1. However, the lens of Figure 2 provides excellent protection from the effects of undesirable blue light (transmittance at 450 nm: 1.3%; transmission at 460 nm: 3.5%).

Figure 3 shows the transmission curve of category 2 blue edge filter lens (T _ν = 23.7%). At 460 nm, the transmittance of the lens is 2.1%. At 490 nm, the transmittance is 6.5 times higher (13.8%). The lens does not damage traffic signal detection and provides UV protection (transmittance at 380 nm: 0.1%; transmittance at 400 nm: 0%). In addition to providing protection from UV radiation and from damaging blue light and protection, the lens also protects from the brightness of visible light. At 490 nm, the transmittance is relatively low. Therefore, like any sunglasses, the lens can have an impact on the circadian rhythm of the human body, especially when the lens is worn in a building for a long period of time (this is not a typical use of sunglasses).

Figure 4 shows the transmission curve of category 3 blue edge filter lens (T _ν = 12.7%). Therefore, the lens is darker than the lens of FIG. 3. At 460 nm, the transmittance of the lens is 1.2%. At 490 nm, the transmittance is 6 times higher (7.2%). The lens provides UV protection (transmittance at 380 nm: 0.1%; transmittance at 400 nm: 0%) and does not damage traffic signal detection. At 490 nm, the transmittance is low (7.2%). The lens provides triple protection: protection from UV radiation, protection from damaging blue light, and protection from the brightness of visible light. Example Example 1a (CR-39) Step a)

Provide undyed lenses made of CR-39 (also known as Columbia resin 39). Step b)

A water-based yellow dye dispersion is provided, which consists of 100 ml OPTOChrome 88E gelb (available from Optoconsult GmbH, Bestensee, Germany) and 750 ml deionized water. The yellow dye dispersion was heated to a temperature of 96°C. The lens of step a) was then immersed in the heated yellow dye dispersion for 55 minutes. During this coloring procedure, the yellow dye dispersion is preferably stirred. The lens thus obtained has an aesthetically unacceptable yellow color. The lens was washed with deionized water before proceeding to step c). Step c)

A water-based shading dye dispersion is provided, which consists of 100 ml OPTOChrome 79B Rot4 (available from Optoconsult GmbH, Bestensee, Germany) and 750 ml deionized water. The shading dye dispersion was heated to a temperature of 96°C. The lens obtained in step b) was then immersed in the heated shading dye dispersion for 1.5 minutes. During this coloring procedure, the shading dye dispersion is preferably stirred.

Measure the transmittance of the lens thus obtained, and visually check the shade of yellow. The second inspection is successful, that is, the transmission curve and color of the lens meet the requirements. Therefore, there is no need to immerse the lens in the dye dispersion liquid for a second time. Step d)

The lens obtained in step c) was heated to a temperature of 92°C for 1.5 hours. This fixing step is carried out in a commercially available oven. Example 1b (CR-39)

Repeat example 1a. However, this time, heating the lens obtained in step c) to a temperature of 120°C took only 20 minutes. The lens thus obtained is more stable when exposed to UV light, that is, the fixing step is more effective. Example 2a (MR8) Step a)

Provide undyed lenses made of MR8 (available from Mitsui Chemicals). Step b)

In order to color MR8, activation is required. Therefore, the lens provided in step a) is immersed in the commercially available activator liquid OPTOChrome Activator 1.6 klar (available from BOW-Berliner Optik Welt, Germany) for about 10 minutes.

A water-based yellow dye dispersion is provided. The dispersion consists of 118 ml BPI Filter Vision UV Blue Winter Sun (available from Brain Power International Ltd, Warwickshire, England) and 1000 ml deionized water. The yellow dye dispersion was heated to a temperature of 96°C. The lens was then immersed in the yellow dye dispersion for 4.5 minutes. During this procedure, the composition was stirred to prevent sedimentation. The lens thus obtained has an extremely bright lemon yellow color. The lens was washed with deionized water before proceeding to step c). Step c)

A water-based shading dye dispersion is provided, which consists of 100 ml OPTOChrome 79B Rot4 (available from Optoconsult GmbH, Bestensee, Germany) and 750 ml deionized water. The shading dye dispersion was heated to a temperature of 96°C. The lens obtained in step b) is then immersed in the heated shading dye dispersion for 1 minute. During this coloring procedure, the shading dye dispersion can be stirred.

The lens thus obtained still has lemon yellow which is not aesthetically acceptable. Therefore, step c) is repeated for a second time to obtain a lens with an aesthetically acceptable color. The lens was immersed in the shading dye dispersion for a total of about 10 minutes. Step d)

The lens obtained in step c) was heated to a temperature of 92°C for 1.5 hours. This fixing step is carried out in a commercially available oven. Example 2b (MR8)

Repeat example 2a. However, this time, heating the lens obtained in step c) to a temperature of 120°C took only 20 minutes. The lens thus obtained is more stable when exposed to UV light, that is, the fixing step is more effective. Example 3 ( Brown sunglasses ; CR-39)

Repeat example 1a. However, in Example 3, other dyes were used to provide darker lenses suitable for making sunglasses. Step a)

Provide undyed lenses made of CR-39 (also known as Columbia resin 39). Step b)

A water-based yellow dye dispersion is provided, which consists of 100 ml OPTOChrome 88E gelb (available from Optoconsult GmbH, Bestensee, Germany) and 750 ml deionized water. The yellow dye dispersion was heated to a temperature of 95°C. The lens of step a) was then immersed in the heated yellow dye dispersion for 58 minutes. During this coloring procedure, the yellow dye dispersion can be stirred. Step c)

The aqueous shading dye dispersion is prepared as follows: 250 ml of Shades Brunex are mixed with 750 ml of deionized water. The obtained mixture is then heated to a temperature of 95°C with optional stirring. After reaching this temperature, 100 ml of Shades Amethyst are added and the mixture thus obtained is heated to a temperature of 95° C. with optional stirring. After reaching this temperature, 40 ml of Shades Pink are added and the mixture thus obtained is heated to a temperature of 95° C. with optional stirring. Finally, 40 ml of Optoconsult 55D blau was added, and the mixture thus obtained was heated to a temperature of 95° C. under optional stirring. Therefore, a shading dye dispersion containing water and multiple dyes is provided. All dyes can be purchased from Cerium Optical Products (Kent, UK) or Optoconsult GmbH (Bestense, Germany).

The lens obtained in step b) is then immersed in the heated shading dye dispersion for 1.5 minutes to achieve 75% absorption. To achieve 85% absorption, repeat step b) so that the total duration of coloring step b) is 2.5 minutes. Step d)

The lens obtained in step c) was heated to a temperature of 92°C for 1.5 hours. Example 4 ( green sunglasses ; CR-39)

Repeat example 1a. However, in Example 4, other dyes were used to provide green lenses suitable for making sunglasses. Step a)

Provide undyed lenses made of CR-39 (also known as Columbia resin 39). Step b)

A water-based yellow dye dispersion is provided, which consists of 100 ml OPTOChrome 88E gelb (available from Optoconsult GmbH, Bestensee, Germany) and 750 ml deionized water. The yellow dye dispersion was heated to a temperature of 95°C. The lens of step a) was then immersed in the heated yellow dye dispersion for 58 minutes. During this coloring procedure, the yellow dye dispersion can be stirred. Step c)

The aqueous shading dye dispersion is prepared as follows: 250 ml of Shades Midnight is mixed with 750 ml of deionized water. The obtained mixture is then heated to a temperature of 95°C with optional stirring. After reaching this temperature, 80 ml of Shades Black Midnight are added and the mixture thus obtained is heated to a temperature of 95° C. with optional stirring. After reaching this temperature, 30 ml of Shades Brunex are added and the mixture thus obtained is heated to a temperature of 95° C. with optional stirring. Finally, 8 ml of Optoconsult 88E is added, and the mixture thus obtained is heated to a temperature of 95°C under optional stirring. Therefore, a shading dye dispersion containing water and multiple dyes is provided. All dyes can be purchased from Cerium Optical Products (Kent, UK) or Optoconsult GmbH (Bestense, Germany).

The lens obtained in step b) is then immersed in the heated shading dye dispersion for 2 minutes.

Next, an additional aqueous shading dye dispersion was prepared, which consisted of 100 ml Shades Green (Cerium Optical Products, Kent, UK) and 750 ml deionized water. This additional aqueous shading dye dispersion is heated to a temperature of 95°C. The lens was then immersed in this additional aqueous shading dye dispersion for 90 seconds. After this additional tinting step, a green lens is obtained. It is recommended to fix the color by heating. Examples 5 and 6 ( brown and green sunglasses ; MR8)

Repeat Examples 3 and 4. However, in Examples 5 and 6, a lens made of MR8 was used instead of a lens made of CR-39. Therefore, before repeating the procedures of Examples 3 and 4, respectively, the lens must be activated similarly to Example 2a. Therefore, brown (Example 5) and blue-green edge filter lenses with UV protection (Example 6) were obtained. Both lenses are suitable for manufacturing sunglasses. Example 7 ( manufacturing glasses )

Make some glasses. To this end, the lenses of Examples 1 to 6 were built into commercially available lens frames.

(no)

Claims (15)

A method of manufacturing a blue edge filter lens, the method includes the following steps: a) Provide an undyed lens, the lens comprising or consisting of at least one organic polymer, b) Immerse the lens of step a) in an aqueous yellow dye dispersion, and c) shading the yellow color of the lens obtained in step b) at least partly by immersing the lens obtained in step b) in an aqueous shading dye dispersion. Such as the method of claim 1, which further includes the following steps: d) The lens obtained in step c) is heated at a temperature from 110°C to 130°C for 15 minutes to 25 minutes. Such as the method of claim 1 or 2, wherein the transmittance of the lens obtained in step b) and/or step c) is measured at least at 460 nm, and wherein if it is obtained in step b) or step c) The lens transmits more than 6% of incident light with a wavelength of 460 nm, and the lens obtained in step b) or step c) is immersed in the aqueous yellow dye dispersion of step b) for a second time. The method according to any one of claims 1 to 3, wherein the aqueous shading dye dispersion in step c) comprises red, green and/or blue dyes, and wherein the shading dye dispersion preferably comprises at least one red dye . Such as the method of any one of claims 1 to 4, wherein if the lens obtained in step c) has an aesthetically unacceptable color, the lens obtained in step c) is immersed in step c) The aqueous shading dye dispersion lasts for a second time. The method of any one of claims 1 to 5, wherein the undyed lens comprises or consists of at least one thermosetting polymer, and/or wherein the undyed lens comprises at least one polyamine The formate or at least one polycarbonate is composed of at least one polyurethane or at least one polycarbonate, and wherein the polycarbonate is preferably allyl diethylene glycol carbonate. A blue edge filter lens, which can be obtained by the method according to any one of claims 1 to 6. Preferably, the blue edge filter lens of claim 7, wherein the blue edge filter lens transmits less than 6%, preferably less than 5%, of light having a wavelength of 460 nm, and the blue The transmittance of the edge filter lens at 490 nm is preferably at least 5 times higher than the transmittance at 460 nm, and more preferably at least 6 times higher. For example, the blue edge filter lens of claim 7 or 8, wherein the blue edge filter lens is suitable for night driving, and/or the blue edge filter lens belongs to filter category 0 or 1, The transmittance of the blue edge filter lens at 490 nm is preferably at least 29%, more preferably at least 35%, and most preferably at least 40%. For example, the blue edge filter lens of claim 7 or 8, wherein the blue edge filter lens does not impair traffic signal detection, and/or the blue edge filter lens belongs to filter category 2 or 3. The blue edge filter lens of any one of claims 7 to 10, wherein the blue edge filter lens transmits less than 1% of UV light having a wavelength of 380 nm, and/or wherein the blue The edge filter lens transmits less than 1% of UV light with a wavelength of 400 nm. A glasses comprising at least one, preferably at least two blue edge filter lenses as in any one of Claims 7 to 11. A kit includes at least one blue edge filter lens and at least one dietary supplement. Such as the set of claim 13, wherein the set includes the glasses of claim 12, and/or Wherein the at least one dietary supplement comprises lutein and/or zeaxanthin, and/or The set includes a package booklet, and the package booklet is recommended to protect the eyes by wearing glasses with blue-edge filter lenses and taking a dietary supplement containing lutein and/or zeaxanthin. A use of a dispersion liquid containing red, green and/or blue dyes used to shade the yellow color of a blue edge filter lens.

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