JP2020109435A - Spectacle lens and spectacles - Google Patents

Abstract

To provide a spectacle lens which provides comfortable vision over an entire range from a long distance to a short distance including intermediate distances therebetween, and to provide spectacles having the same.SOLUTION: A lens disclosed herein is configured such that its power is highest in a predetermined portion near the center thereof, and is smoothly and gradually reduced outward therefrom.SELECTED DRAWING: Figure 1

Description

The present invention relates to eyeglass lenses and eyeglasses.

Conventionally, an idea has been proposed that allows one eyeglass to see a long distance, a short distance, and a middle distance therebetween. For example, Japanese Unexamined Patent Publication No. 3-284716 (Patent Document 1) discloses a cumulative multifocal spectacle lens having a plurality of focal lengths depending on the distance from long-distance to short-distance for one lens. In such a progressive multifocal spectacle lens, the line of sight is generally directed upward when looking at a distant position, and the line of sight is directed downward when viewing a so-called hand such as reading or smartphone operation. Area, a middle distance area is provided in the upper part of the lower half, and a short distance area is provided in the lowest part.

In addition, in Japanese Patent Laid-Open No. 2003-29216 (Patent Document 2), small area lens units 3A and 3B having focal lengths for long distance, medium distance, and short distance over the entire lens 1 are provided. A lens for reading glasses having a large number of 3C has been proposed. By arranging these small area lens parts with different focal lengths infinitely or randomly without bias, the wearer's brain automatically selects a small area lens part suitable for the distance of the object to be seen, and through it, It is explained that it is easy to use because it looks at the object.

JP-A-3-284716 JP, 2003-29216, A

However, in the progressive multifocal spectacle lens as in the above-mentioned Patent Document 1, there are relatively wide long-distance, medium-distance, and short-distance areas and a narrow connection area for interconnecting them, and the long-distance connection area Since the frequency is rapidly changed in a narrow width from short-distance to medium-distance or from medium-distance to short-distance, there is a problem that distortion is likely to occur and the focus range is narrow, and the visibility is not very good. Further, while the field of view for the long-distance area is secured relatively wide, the field of view for the medium-distance area and the short-distance area is limited to the vertically narrow range in the center of the lower half, and deviates to the left and right from there. Then, the appearance suddenly becomes unclear, and it may be very uncomfortable. Moreover, since the short-distance area is provided at the bottom of the lens, when looking at the smartphone screen or the hand for reading, it is easy to tire the eyes by lowering the line of sight, or the face may be slightly upward. There is a problem in that it takes a natural posture.

In the lens for reading glasses of Patent Document 2 described above, only three types of focal lengths for long distance, medium distance, and short distance are set, and intermediate distances between them are supported. Therefore, the user has to adjust the distance between his/her eyes and his/her eyes by moving his/her head or body back and forth, flexing/holding a hand holding an object, moving his/her place, etc. If the number of types of focal lengths is increased to accommodate intermediate distances, the number of small area lens parts that are difficult to see increases at each distance, so the small area lens parts are arranged infinitely or randomly. In such a configuration, there is a problem in that the user often feels uncomfortable or causes dizziness because the out-of-focus is often caused by hanging on a small area lens part that is difficult to see due to a slight movement of the line of sight.

In view of the above-mentioned circumstances, the present invention can clearly see both a long distance and a short distance and an intermediate distance therebetween, and drastically lowers the line of sight when viewing the hand with a smartphone or reading. Provided are a reading glass lens and reading glasses that can be viewed with a natural feeling without doing.

The invention of claim 1 provides a lens for spectacles, characterized in that the diopter changes smoothly such that the diopter is highest in a predetermined portion of the lens and diminishes gradually toward the outside.

The invention of claim 2 provides a spectacle lens characterized in that the power is highest in a predetermined portion of the lens, and the power is smoothly changed so that the power gradually decreases from that portion to the peripheral portion of the lens. ..

According to a third aspect of the present invention, there is provided a spectacle lens characterized in that the dioptric power is smoothly changed so as to form an innumerable ring in which the dioptric power is highest in a predetermined portion of the lens and gradually diminishes toward the outside. provide.

The invention according to claim 4 is characterized in that the power is smoothly changed so as to form an innumerable ring in which the power is highest in a predetermined portion of the lens and gradually decreases from that portion to the peripheral portion of the lens. Provide a lens for use.

The invention of claim 5 provides the spectacle lens according to claim 3 or 4, wherein the innumerable annular shape is concentric with the predetermined portion.

The invention of claim 6 provides the spectacle lens according to any one of claims 1 to 5, characterized in that the frequency changes at a substantially constant rate according to the distance from the predetermined portion.

The invention of claim 7 provides a lens for spectacles, characterized in that the power is highest in a predetermined portion of the lens, and the power gradually changes stepwise such that the power gradually decreases toward the outside. ..

The invention of claim 8 is characterized in that the power is highest in a predetermined portion of the lens, and the power is gradually changed stepwise so that the power gradually decreases from that portion to the peripheral portion of the lens. I will provide a.

The invention according to claim 9 is characterized in that the power is gradually changed stepwise so as to form a multiple annular portion in which the power is highest in a predetermined portion of the lens and gradually decreases toward the outside. An eyeglass lens is provided.

The tenth aspect of the invention is that the power is gradually increased stepwise so as to form a multiple annular portion in which the power is highest in a predetermined portion of the lens and the power is gradually reduced from that portion to the peripheral portion of the lens. A characteristic spectacle lens is provided.

The invention of claim 11 provides the spectacle lens according to claim 9 or 10, wherein the multiple annular portions are concentric with the predetermined portion.

According to a twelfth aspect of the present invention, the multiple annular portions have mutually the same width between the outer diameter portion and the inner diameter portion, and the frequency of each step is substantially constant according to the distance from the predetermined portion. The spectacle lens according to any one of 9 to 11, wherein the spectacle lens changes.

The invention of claim 13 provides a lens for eyeglasses, characterized in that the power is highest in a predetermined portion of the lens, and the power is changed at a substantially constant rate such that the power gradually decreases outward from there. ..

The invention of claim 14 is characterized in that the power is highest in a predetermined portion of the lens, and the power is changed at a substantially constant rate so that the power gradually decreases from that portion to the peripheral portion of the lens. I will provide a.

The invention of claim 15 is characterized in that the dioptric power is changed at a substantially constant rate so as to form a multiple annular portion in which the dioptric power is highest in a predetermined portion of the lens and gradually diminishes toward the outside. An eyeglass lens is provided.

According to the sixteenth aspect of the present invention, the dioptric power is changed at a substantially constant rate so as to form a multiple annular portion in which the dioptric power is highest in a predetermined portion of the lens and the dioptric power is gradually lowered from that portion to the peripheral portion of the lens. A characteristic spectacle lens is provided.

According to a seventeenth aspect of the present invention, there is provided a spectacle lens, wherein the dioptric power smoothly and gradually changes from a predetermined portion of the lens toward the outside.

The invention of claim 18 provides a lens for spectacles, characterized in that the power gradually changes stepwise from the predetermined portion of the lens toward the outside in order of height.

A nineteenth aspect of the present invention provides a spectacle lens, wherein the power gradually changes from a predetermined portion of the lens toward the outside in the order of high and low at a substantially constant rate.

The invention of claim 20 provides a lens for spectacles, wherein the dioptric power gradually changes from a predetermined portion of the lens toward the outside in order of height.

The invention of claim 21 provides spectacles comprising the spectacle lens according to any one of claims 1 to 20 in both eyes.

The invention according to claim 22 provides the spectacles according to claim 22, wherein the predetermined portion is offset below the center position of the lens in the spectacles.

The invention of claim 23 is characterized in that the predetermined portion is offset below a position opposite to an eye point of a user wearing the glasses. I will provide a.

The invention of claim 24 provides a resin molding die for an eyeglass lens, comprising a transfer surface for transferring an optical surface of the lens for eyeglasses according to any one of claims 1 to 24. To do.

In the spectacle lens according to the present invention, since one lens is provided with portions of slightly different powers, the brain works unconsciously to select a lens portion suitable for the distance of the object to be seen, and through that portion The target object becomes clearly visible. In particular, the power is set so as to gradually change from a predetermined portion of the lens toward the outside, and the same width is divided for any power or changes at a substantially constant rate. Unlike long-distance, medium-distance, and short-distance areas that interconnect each area as in the conventional progressive-power multifocal spectacle lens, it rapidly changes the power within a narrow connection area. It is a structure that is easy to focus and is less likely to cause distortion. Also, unlike micro lenses with different powers arranged innumerably in a regular or random manner, a wide range of powers is ensured, but a slight movement of the line of sight does not cause extreme defocusing, and of course dizziness. You don't have to worry about waking up.

In the spectacle lens of the present invention, the power is set so as to spread outward from the predetermined portion of the lens as a center, and the power is set to change smoothly or step by step little by little. You can get used to it immediately after you start using it, and you can see things comfortably, and even if you move your eyes slightly, you will not feel uncomfortable or get out of focus on an unclear area. , Don't worry about dizziness. Also, by setting the predetermined part that is the starting point of the frequency change to the highest frequency that is suitable for hand use, when reading or smartphone operation and looking at fine characters with conspicuous eyes It is not necessary to make a perfect line of sight and eyestrain is reduced.

In addition, the coarse frequency setting like the conventional far/medium/short distance is set, and the fine frequency setting is made, so that the user can roughly understand the suitable frequency range, It is possible to select products to be purchased based on the power range set for each pair of glasses without performing a detailed visual acuity test or power adjustment. Further, even if the visual acuity changes with age due to the progress of presbyopia, it is not necessary to remake the glasses one by one because the power suitable for the distance the brain wants to see is appropriately selected and automatically adjusted. Therefore, the same lens and the same spectacles can be used for various usage situations such as reading, smartphone operation, personal computer operation, television watching, and changes in visual acuity in the morning and evening.

According to the spectacles having the spectacle lens in both eyes, the above-mentioned effects can be obtained, and the same lens can be used by the automatic adjustment function even when the left and right visual acuity are slightly different, so that the manufacturing cost can be suppressed. You can In addition, by offsetting the predetermined portion having the highest dioptric power from the center position in the vertical direction of the lens or the position facing the center position of the eye point of the user, the line of sight can be lowered to read or read. You will be able to see your smartphone operation naturally. According to the resin molding die for an eyeglass lens having a transfer surface for transferring the optical surface of the eyeglass lens, the eyeglass lens can be easily manufactured.

FIG. 1 shows a front view of eyeglasses according to a first embodiment of the present invention and a partially enlarged view (within a circular frame) of a lens for eyeglasses used therein. The lens for spectacles of 1st Example is shown. The modification of the spectacle lens of 1st Example is shown. The front view of the spectacles which concerns on 2nd Example of this invention, and the frequency distribution of the lens for spectacles used for it are shown. The front view of the modification of the spectacles which concerns on 2nd Example of this invention, and the frequency distribution of the lens for spectacles used for it are shown.

Hereinafter, eyeglasses according to embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the reading glasses 1 are composed of two reading glasses 2 and 2 and a frame 3 having these lenses attached to both eyes and mounted on the user's face. The reading glasses lens 2 is made of a colorless or colored transparent resin material such as acrylic or polycarbonate, and as shown in the circle in FIG. 1, a large number of vision correcting microlenses 4 are arranged adjacent to each other without a gap. It is integrally resin molded. The frame 3 is formed of a resin such as acetate or a light metal such as titanium or a titanium alloy. In FIG. 1, the temples (vines) and nose pads of the frame 3 are not shown.

The reading lens 2 is melted into its cavity by clamping an injection molding die for a lens having a transfer surface for transferring the optical surface of the lens on which a large number of microlenses 4 are arranged. It is molded by injecting a resin material. As shown in FIG. 1, the optical surface of the lens for reading glasses 2 has a vertical and horizontal dimension of about several tens of micrometers (for example, 50 to 100 micrometers) from the predetermined portion 2A provided near the center thereof toward the outside. A large number of small microlenses 4 are arranged. The number of microlenses 4 arranged on one piece of reading glass lens 2 cannot be generally stated because it is processed into various shapes and sizes depending on the frame to which the lens is attached, but from the center to the peripheral portion. About 150 to 300 microlenses are arranged so as to line up before reaching.

The microlenses 4 are all monofocal lenses, and are aspherical lenses whose optical surfaces are aspherical surfaces so as to eliminate aberrations (particularly spherical aberration, coma, and astigmatism). Therefore, as long as the focal lengths match even when viewed through any of the microlenses, the object can be clearly viewed without distortion, bleeding, blurring or the like. Note that a large number of aspherical lenses can be easily formed by using a resin molding die. Further, as shown in FIG. 1, each microlens 4 has a regular hexagonal outer peripheral portion, and is arranged adjacent to each other without a gap so as to form a honeycomb structure in the whole reading glass lens. Therefore, there is no uncorrected area that does not contribute to vision correction, the field of view becomes clearer, and the object can be seen more clearly, and the number of microlenses per unit area increases, resulting in a wide frequency range. ..

FIG. 2 shows the arrangement of the microlenses 4 by enlarging the periphery of the predetermined portion 2A offset slightly below the center position (center position in the vertical and horizontal directions) 2X of the reading glasses lens 2. It is shown. Here, the offset arrangement means that the center position of the predetermined portion 2A is shifted below the center position 2X (FIG. 1) of the lens. On the optical surface of the reading glasses lens 2, a substantially hexagonal ring is formed around _one microlens (hereinafter, referred to as a specific microlens) 41 arranged in the predetermined portion 2A, which surrounds the circumference in multiple layers. A large number of microlens groups 4 ₂ , 4 ₃ , 4 ₄ , 4 _5, ... (Hereinafter collectively referred to simply as 4 _i ) are arranged without a gap. Since the microlenses 4 are integrally molded with each other, a clear borderline does not appear as shown in the figure, and a thicker borderline merely serves to easily distinguish each microlens group. Is.

In FIG. 2, only the periphery of the predetermined portion 2A is partially drawn and drawn, but in actuality, as shown by the arrow, the annular microlens group 4 _i is the outer portion of the reading glasses lens 2 from the predetermined portion 2A toward the outside. It is provided so as to form multiple annular portions that continuously extend to the peripheral portion. The number of the annular microlens groups 4 _i naturally varies depending on the number of the microlenses 4 arranged in the reading glasses lens 2, and for example, 200 microlenses 4 are arranged from the predetermined portion 2A to the lens upper edge portion. Then, the annular microlens groups 4 _i are also the same number, that is, 200. In this embodiment, the predetermined portion 2A is offset downward as described above, and the number of microlenses lined up from the predetermined portion 2A to the lens lower edge is less than 200. It goes without saying that there is a ring-shaped microlens group that does not exist.

4 _i each annular group of microlenses, which is made by arranging the respective annular single row a plurality of micro-lenses of the same power as shown in FIG. 2, on the other hand, certain microlens 4 ₁ and other The frequency is set to be slightly different from that of the annular microlens group 4 _i . Specifically, the frequency D ₁ (+2.50D) of the specific microlens 4 ₁ arranged in the predetermined portion 2A is set to the highest, and the frequency D of the annular microlens group 4 ₂ that directly surrounds the periphery is set. ₂ (+2.49D) is set to be slightly lower, and the frequency D ₃ (+2.48D) of the annular microlens group 4 ₃ that surrounds the outside thereof, and the frequency of the annular microlens group 4 ₄ that further sequentially surrounds the outside thereof. D ₄ (+2.47D), 4 ₅ power D ₅ (+2.46D) ··········. It is set so that the power varies with (0.01 D each) and becomes the lowest power (for example, +0.60 D) at the upper edge of the lens.

Although the rate of change in the power is extremely small, the width of each annular microlens group 4 _i is set to one microlens (about several tens of micrometers), and a very large number of power steps are provided, so that the entire lens has a wide power range. Can be set. For example, in this lens, the frequency D ₅₁ of the _51st annular microlens group 4 ₅₁ is +2.00D, 101st from the specific microlens 4 ₁ having the frequency D ₁ (+2.50D) in the predetermined portion 2A toward the outside. The power D ₁₀₁ of the annular microlens group 4 ₁₀₁ changes to +1.50D, and the power D ₁₅₁ of the _151st annular microlens group 4 ₁₅₁ changes to +1.00D.

The reading glasses lens 2 is a finished lens that is processed into a lens shape so as to match the shape of the frame 3, and the predetermined portion 2A with the highest frequency is set at a position slightly offset from the center position 2X of the lens. Therefore, in the state of the original lens before processing, a predetermined portion having the highest altitude is provided at a position displaced in advance from the center position. It is possible to process by shifting the center position when aligning with the frame shape without offsetting the center position of the predetermined number of altitudes and the center position of the original lens, but if the lens fitting part of the frame is large, the size of the lens This is because there may be a shortage, and if the original plate lens is enlarged to cope with this, the yield will deteriorate.

The reading lens 2 unconsciously selects the microlens 4 _i suitable for the distance to the object to be seen by the action of the brain, and automatically focuses on the object through the microlens of the selected frequency, so that all objects are You can see clearly with one lens. Specifically, those that are 20 cm (eg, smartphone screen), 30 cm (eg, book), 50 cm (eg, PC screen) or 1 meter or more (eg, TV screen) away from the eyes, and in between It is possible to deal with objects at various distances, such as those at a desired distance, by the same single lens 2 for reading glasses.

In particular, the multiple annular microlens groups 4 _i whose power gradually decreases from the predetermined portion 2A provided near the center of the reading glasses lens 2 toward the outside (periphery) are each called an array of microlenses (tens of microns). Since it is configured to have a small width and the power is changed finely in the order of high and low, a feeling of strangeness such as a sharp power change occurs when the user slightly moves his or her line of sight with respect to the reading glasses lens 2. There is no need to worry about dizziness. On the other hand, since the microlenses 4 are arranged in the order of power and continuously, even if the user approaches or moves away from an object to be viewed, the power can be smoothly switched to a power suitable for the distance and is always maintained. You can see it comfortably.

Also, with the reading glasses lens 2, the power is set at very fine intervals instead of the coarse power settings such as the far/medium/near distances of the conventional multifocal lens, so a rough power suitable for oneself is provided. If the range is known, it is possible to immediately purchase and use it based on the power range set for each pair of glasses without performing a precise visual acuity test or power adjustment. Even if the visual acuity changes with age due to presbyopia or changes in visual acuity due to differences in eye fatigue in the morning and evening, as long as it is within the set diopter range, the power part suitable for the distance that the brain wants to see from one lens Is selected and the frequency is automatically adjusted, so that it is not necessary to frequently remake or replace the glasses. Further, even if the left and right visual acuity of the user are slightly different from each other, since the left and right symmetrical substantially the same lens can be used, the manufacturing cost of reading glasses is suppressed.

In addition, when you look at your hand while reading or using a smartphone, you should keep your line of sight downwards, but at that time you should face down a little and look down, so you should have a short focal length for short distances. The part is set slightly below the eye point (eye position) of the user wearing the spectacles to obtain a natural line of sight. Therefore, in consideration of the fact that the center position of the eye point is generally set so that the center positions of the lenses coincide with each other when the front is viewed, the reading glasses 1 are slightly lower than the vertical center position 2X of the lens 2. On the side, the micro lens with the highest frequency is placed. Further, with such an arrangement, since the medium-range to long-distance microlenses are widely arranged on the upper part of the lens, it becomes easy to see other than the hands.

(Modification of the first embodiment)
In the first embodiment, the predetermined portion 2A having the highest dioptric power of the reading glass lens 2 is formed by _one specific microlens 41, but instead of this, as shown in FIG. A group of microlenses 4 ₁ ′ formed by collectively disposing the lenses may be used. Further, each annular microlens group 4 _i composed of microlenses of the same frequency is a single row in which the microlenses are arranged in a row, but instead of this, the microlens area groups 4 ₂ ′, 4 shown in FIG. _It is also possible to use multiple rows arranged in two rows (a plurality of rows) such as ₃ ′, 4 ₄ ′... In addition, the power is set to be highest near the center of the lens and gradually decrease toward the peripheral edge from that, but on the contrary, depending on the application, the power is lowest near the center of the lens and gradually decreases toward the peripheral edge. You may make it high.

In the first embodiment, each microlens 4 has a regular hexagonal shape so that a large number of microlenses can be arranged or an uncorrected area is not formed between the microlenses. A circular shape may be used as long as it does not significantly affect the formation of the (annular microlens group), and another shape such as an equilateral triangle, a square, or another polygon may be adopted. Further, in the above embodiment, the microlenses are arranged adjacent to each other so that each annular microlens group constitutes a hexagon, but the present invention is not limited to this, and the microlenses may be arranged so as to form an annular shape or a rectangular frame shape, The microlenses may be arranged close to each other as long as the gap between them does not become too large.

In the first embodiment, placing importance on convenience when viewing a hand such as reading or operating a smartphone, the micro lens 4 ₁ (4 ₁ ′), which is the predetermined portion 2A having the highest frequency, is placed above the eye point of the user. The offset position is set slightly lower than the center position 2X of the lens so that it is slightly lower than the center position 2X, but the position is not limited to this. It can be set freely such as arranging it within a range that does not greatly deviate. Further, although the lens 2 for reading glasses is injection-molded with a resin such as acrylic resin, other molding methods may be adopted or glass may be used.

(Second embodiment)
As shown in FIG. 4, the reading glasses 5 are composed of two reading glasses 6 and 6 and a frame 7 to which these lenses are attached to both eyes. The frame 7 has the same structure as the frame 3 of the first embodiment, and the temples and nose pads are not shown. Like the reading glasses lens 2 of the first embodiment, the reading glasses lens 6 is also made of a transparent resin material such as acrylic or carbonate using an injection molding die for a lens having a transfer surface for transferring the optical surface of the lens. Has been done.

The reading glass lens 6 attached to the reading glasses 5 has the highest frequency (for example, +2.50D) in the predetermined portion 6A that is offset slightly below the central position (vertical and horizontal center position) 6X. As shown in the graph of FIG. 4, it has an optical surface that smoothly changes in power so that the power gradually decreases from the predetermined portion 6A toward the outer peripheral portion of the lens at a substantially constant rate. It becomes. Therefore, when a line is drawn so as to connect points of the same frequency on the optical surface of the reading glass lens 6, as shown in FIG. 4, from the predetermined portion 6A arranged near the center of the lens to the outer peripheral portion. An infinite number of rings appear to form a concentric circle.

The reading glass lens 6 is a so-called finished lens that is edged so as to match the shape of the frame 7, and the predetermined portion 6A with the highest frequency is set at a position slightly shifted from the center position 6X of the lens to the lower side. However, in order to deal with this, in the state of the original lens before processing, the predetermined portion having the highest altitude is provided at a position displaced from the center position. Even if the predetermined position of the altitude number and the center position of the original lens are not offset, it can be processed by shifting the center position when adjusting to the frame shape, but in such a case, in the lens fitting part of the frame On the other hand, the size of the lens may be insufficient. Further, if the original lens is made larger in order to cope with it, the yield is deteriorated.

According to the reading glasses 5 (lens for reading glasses 6), the power of the brain unconsciously selects a power suitable for the distance of the object to be viewed, and the object is automatically focused through the selected power, so that the set distance is set. Everything in the range is clearly visible with a single lens. Since the frequency changes continuously in the order of high and low, for example, even if the user approaches or moves away from the object he or she is looking at, the function of the brain allows the user to smoothly gaze at the appropriate frequency part for viewing that object. You can always see comfortably as the image moves and the frequency changes quickly.

The lens 6 for reading glasses is not a coarse power setting such as the far/medium/near distance of the conventional multifocal lens, but is continuously set in a wide power range of a predetermined width, so that the desired distance is assumed one by one. Even if the power is not adjusted accordingly, the spectacles can be selected based on the rough power range suitable for the user. Even if there is visual acuity change due to presbyopia progression or visual acuity change due to tiredness of the eye, the brain automatically selects the power suitable for the distance to be viewed from the power set continuously on one lens, and automatically adjusts , You don't have to remake or change your glasses frequently. Further, even if the left and right visual acuity of the user are slightly different from each other, the left and right symmetrical substantially same lenses can be used, so that the manufacturing cost of the reading glasses 5 is suppressed.

In addition, when you look at your hand while reading or using a smartphone, the line of sight should be directed downwards accordingly, but at that time, the face will be slightly downward so that you will naturally fall down, so the altitude with a short focal length for short distances By arranging a few parts slightly below the eye point (eye position) of the user wearing the glasses, it is possible to see with a very natural line of sight. Therefore, based on the fact that it is generally good to set the center position of the eye point and the center position of the lens to coincide when looking at the front, in the reading glasses 5, the vertical center position of the lens 6 A predetermined portion 6A having the highest frequency is offset arranged slightly below 6X. Further, with such an arrangement, since the medium-range to long-distance microlenses are widely arranged on the upper part of the lens, it becomes easy to see other than the hands.

(Modification of the second embodiment)
In the second embodiment described above, the reading glasses 5 have a dioptric power which smoothly changes from the predetermined portion 6A having the highest power of the reading glasses 6 toward the outside continuously, but instead of this, As shown in FIG. 5, by providing a spectacle lens 6 ′ that forms a plurality of concentric circular multiple annular portions with a little width from the predetermined circular portion 6 A ′ having the highest frequency toward the outside, it is gradually and gradually The reading glasses 5'which change in frequency may be used. Here, by aligning all the widths of the outer diameter portion and the inner diameter portion of each annular portion to be the same as each other, and making the frequency change between each annular portion substantially constant, the distance from the predetermined portion 6A' The frequency may be switched at a constant rate according to the above. This also does not change the power from the altitude portion provided near the center of the lens toward the peripheral portion of the lens in order of height, and does not give the user a feeling of strangeness. In FIG. 5, the power is changed in about 20 steps for convenience of drawing, but it is preferable to set the power in 100 steps or more like the reading glasses of the first embodiment.

In the above-described embodiment, the predetermined portion 6A (6A') provided near the center of the lens has the highest power, and the power is set to gradually decrease from that portion to the outer edge of the lens. On the contrary, depending on the use of the spectacles, it is possible to conversely lower the dioptric power near the center of the lens and gradually increase the dioptric power from there to the peripheral portion of the lens. Further, the multiple rings (ring portions) surrounding the predetermined portion 6A (6A') may be set to have an elliptical shape instead of a circular shape, and other shapes can be adopted.

In the above-described embodiment, the convenience when viewing a hand such as reading or smartphone operation is emphasized, and the predetermined portion 6A (6A') having the highest frequency is placed slightly below the eye point of the user. , The offset position is located slightly below the center position 6X (6X') of the lens, but the position is not limited to this and may be aligned with the center position of the lens, or in the vicinity of the center of the lens and above the center position of the lens. It can be set freely, such as by arranging it. Although the reading glasses lens 6 (6') is made of resin by injection molding, other forming methods and other materials (such as glass) may be adopted.

Although the lens for reading glasses and the reading glasses have been described above, the present invention is not limited to this, and the power setting method in the present invention can be applied to other lenses for glasses and reading glasses. In addition, the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the scope of the invention.

1 Reading Glasses 2 Lens for Reading Glasses 3 Frame 4 Micro Lens 4 ₁ Specific Micro Lens 4 ₂ to 4 ₅ Ring Micro Lens Group'
4 ₁ ′ Massive micro lens group 4 ₂ ′ to 4 ₅ ′ Annular micro lens group 5 Reading glasses 6 Lens for reading glasses 6 A Predetermined part (highest power part)
6X lens center 5'reading glasses 6'reading glasses lens 6A' predetermined part (highest power part)
6X' lens center

Claims (24)

A spectacle lens having a highest power in a predetermined portion of the lens and smoothly changing power such that the power gradually decreases outward from the predetermined power. A lens for spectacles, characterized in that the diopter changes smoothly such that the diopter is highest in a predetermined part of the lens and gradually diminishes from that part to the peripheral part of the lens. A spectacle lens characterized by having a highest power in a predetermined part of the lens and smoothly changing power from the predetermined part to form an innumerable ring whose power gradually decreases toward the outside. A lens for spectacles, characterized in that the dioptric power is smoothly changed to form an innumerable ring in which the dioptric power is highest in a predetermined portion of the lens and gradually diminishes from the peripheral portion to the peripheral portion of the lens. The spectacle lens according to claim 3, wherein the innumerable annular shape is concentric with the predetermined portion. The spectacle lens according to any one of claims 1 to 5, wherein the frequency changes at a substantially constant rate according to the distance from the predetermined portion. A lens for spectacles, wherein the power is highest in a predetermined portion of the lens, and the power gradually changes stepwise such that the power gradually decreases toward the outside. A lens for spectacles, characterized in that the power is highest in a predetermined portion of the lens, and the power gradually changes stepwise such that the power gradually decreases from that portion to the peripheral portion of the lens. A lens for spectacles, wherein the power is highest in a predetermined portion of the lens, and the power is gradually changed stepwise so as to form a multiple annular portion in which the power gradually decreases toward the outside. The tenth aspect of the invention is that the power is gradually increased stepwise so as to form a multiple annular portion in which the power is highest in a predetermined portion of the lens and the power is gradually reduced from that portion to the peripheral portion of the lens. A characteristic spectacle lens. The spectacle lens according to claim 9, wherein the multiple annular portions are concentric with respect to the predetermined portion. The multiple annular portions have the same width sandwiched between the outer diameter portion and the inner diameter portion, and the frequency of each step changes by a substantially constant frequency according to the distance from the predetermined portion. The spectacle lens according to any one of 9 to 11. A lens for spectacles, wherein the power is highest in a predetermined portion of the lens, and the power is changed at a substantially constant rate such that the power gradually decreases toward the outside. A lens for spectacles, wherein the power is highest at a predetermined portion of the lens, and the power is changed at a substantially constant rate such that the power gradually decreases from that portion to the peripheral portion of the lens. A lens for spectacles, characterized in that the dioptric power is changed at a substantially constant rate so as to form a multiple annular part having a highest dioptric power at a predetermined portion of the lens and a diminishing dioptric power from the predetermined portion toward the outside. A lens for spectacles, characterized in that the dioptric power is changed at a substantially constant rate so as to form a multiple annular portion in which a dioptric power is highest in a predetermined portion of the lens and gradually diminishes from that portion to a peripheral portion of the lens. A lens for spectacles, wherein the dioptric power smoothly and gradually changes from a predetermined portion of the lens toward the outside in order of height. A lens for spectacles, wherein the dioptric power gradually changes from a predetermined portion of the lens toward the outside in order of high and low. A spectacle lens, wherein the power gradually changes from a predetermined portion of the lens toward the outside in the order of high and low at a substantially constant rate. A lens for spectacles, wherein the power gradually changes from a predetermined portion of the lens toward the outside in order of high and low. An eyeglass comprising the eyeglass lens according to any one of claims 1 to 20 in both eyes. 23. The spectacles according to claim 22, wherein the predetermined portion is offset below the center position of the lens of the spectacles. 24. The spectacles according to claim 22 or 23, wherein the predetermined portion is offset below a position facing an eye point of a user wearing the spectacles. A resin molding die for an eyeglass lens, comprising a transfer surface for transferring an optical surface of the eyeglass lens according to any one of claims 1 to 24.

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