Contact lenses
Technical field
The present invention relates to contact lenses.Particularly, the present invention relates to a kind of contact lenses, when the wearer wore these contact lenses, it can change the outward appearance of wearer's eyes.More specifically, but nonexcludability ground, contact lenses can make eyes seem bigger and brighter.
Background technology
Contact lenses are widely used in proofreaies and correct polytype defects of vision.These defectives comprise such as defective, the astigmatism of myopia and farsightedness (being respectively myopia and long sight) and ageing-related the usually defects of vision (presbyopia) closely.
Contact lenses can also be used for beauty treatment.A kind of " beauty treatment " glasses comprise tinted glasses.The natural color of using band contact lenses color or coloured to change iris is known.Some eye color seems especially have glamour sometimes, and can wear the contact lenses of expressing characteristic, to cover its natural eye color with another kind of color.These glasses help to improve or change the appearance color of wearer's iris.Generally speaking, these glasses comprise coloured iris portion, and Tinted contact lenses can comprise the optical correction part, for example, regulate the farsightedness or the bathomorphic correction portion of contact lens wearers.Perhaps, for cosmetic purpose, contact lenses can only be provided with coloured iris portion.
Coloured iridial part of retina of the also with good grounds glasses that can buy on the market assigns to produce " beauty treatment " glasses of " greatly " glasses effect.These glasses have a kind of common trait---and glasses are designed to the iris of " being fit to " average case.Coloured iris portion has covered the major part of wearer's iris, stays the less blank parts with wearer's pupil same size.
The problem that these " beauty treatment " glasses run into is the indirect vision that they influence the wearer, and produces the indirect vision of " bluring ".The main cause of this phenomenon is to print star burst (starburst) pattern on the iris portion near vision area of glasses.This starburst-like pattern attempts to give glasses more natural appearance.
Summary of the invention
According to preferred aspect, a kind of contact lenses are provided, it comprises:
(a) pupil region of non-opacity;
(b) iris region of general toroidal, it has area and all around around described pupil region;
(c) be printed on pattern on the described iris region, described pattern extends through the part of the area of described iris region, so that described iris region is given in the structure sense of major general's iris;
Wherein, the diameter of described iris region is greater than the diameter of wearer's iris, and the contact lenses that can make that wearer's eyes seem bigger when wearing described contact lenses are provided thus.
Preferably, the color of printed patterns is identical with wearer's iris color.More preferably, particularly when the wearer was the Asian, the color of printed patterns was a black.Its advantage is that its actual effect is that described contact lenses seem that picture wearer's iris is extending.This extension has produced " greatly " eye effect.
Preferably, the diameter of described pupil region is greater than wearer's pupil diameter.Its advantage is that the described pattern of the printing on the described contact lenses does not hinder indirect vision.
Preferably, printed patterns is formed in the Outboard Sections of described iris region dark-colored image is provided.
Preferably, printed patterns is made of solid color.More preferably, the result of first pattern that printed patterns is and the stack of second pattern, wherein said first pattern and described second pattern are different colours.
Preferably, the area of described pupil region is 20-30mm
2More preferably, described pupil region occupies the 10-20% of whole contact lenses area, and occupies the 60-75% of whole contact lenses area through the iris region of printing.More preferably, occupy the 65-70% of whole contact lenses area through the iris region of printing.
Preferably, printed patterns does not contact the neighboring of described contact lenses.
Preferably, described contact lenses are disposable.
The invention provides a kind of contact lenses, its nature that on eyes, seems, have good beauty treatment glamour, make eyes seem bigger and brighter and do not blur relevant problem with making indirect vision.The glasses of discussion of the present invention do not have starburst-like pattern and the nature that seems on eyes.Eliminate starburst-like pattern and help to obtain good indirect vision.
Description of drawings
In order to make the present invention to be understood fully and to put into practice easily, now only the present invention is described for preferred embodiment by non-limiting example of the present invention.Explanation is carried out with reference to accompanying illustrative embodiments.
In the accompanying drawings:
Fig. 1 illustrates the synoptic diagram according to the contact lenses of the embodiment of the invention;
Fig. 2 illustrates the cut-open view according to the contact lenses of the embodiment of the invention;
Fig. 3 illustrates according to the embodiment of the invention and is printed on " substantially " pattern on the contact lenses;
Fig. 4 illustrates according to the embodiment of the invention and is printed on " annular " pattern on the contact lenses;
Fig. 5 illustrates according to the embodiment of the invention and is printed on composite pattern on the contact lenses (" substantially " pattern and " annular " pattern); And
Fig. 6 illustrates the contact lenses that appear at according to the present invention on wearer's eyes.
Embodiment
With reference to the accompanying drawings, Fig. 1 shows contact lenses 10, and it has the pattern 20 that is printed on the iris region 30, and iris region 30 is along all around around the zone of the pupil region 40 of non-opacity.Nature, printed patterns 20 are formed in the Outboard Sections of iris region 25 that dark-colored image is provided in order to allow glasses on the eyes to seem.In a preferred embodiment, printed patterns 20 neighboring 35 of contact lenses 10 not.Generally speaking, the Asian such as Chinese, Japanese and Korean etc. has dark iris.In these crowds, black is the general color of iris.Therefore, the contact lenses of the embodiment of the invention are provided with black pattern.But, also be fine such as other colors such as brown or grey.Color can be solid color or multiple color combinations.Color can be roughly the same with the color of wearer's iris.
" non-opacity " expression not have to print, not painted or be coloured to the part of edematus (being preferably transparent).
The cut-open view of contact lenses when Fig. 2 illustrates on being worn on wearer's eyes.The printed patterns 20 of glasses 10 exceeds outside wearer's the iris 50.In other words, the diameter of iris region 30 is greater than the diameter of wearer's iris 50.This printed patterns 20 in the position 60 places and wearer's iris 50 overlapping.It is the same that this helps iris 50 with the wearer to be defined as similarly to be wearer's iris 50 to extend, and make wearer's glasses seem bigger.
Another feature of the present invention is not printed around the zone of vision area (pupil region 40).With reference to figure 2, the diameter of pupil region 40 is also greater than the diameter of wearer's pupil 70.This is bigger does not print the indirect vision that pupil region 40 has prevented that not only the printed patterns 20 on the glasses 10 from hindering wearers, and when combining with the printed patterns of deceiving, also makes wearer's glasses seem bigger and brighter.
The areal extent of the pupil region 40 of non-opacity is 20-30mm
2The 10-20% of the area that has occupied whole contact lenses 10 of this pupil region 40.Printed patterns 20 occupies the 60-75% of the area of whole contact lenses 10.Preferably, printed patterns 20 occupies the 65-70% of the area of whole contact lenses 10.Suppose, the mean diameter of wearer's iris be 12-13mm (for simplicity, this diameter comprises wearer's pupil), the area (that is, the sclera zone of eyes (overlapping region 60)) that then is positioned at the printed patterns 20 outside wearer's the pupil is the 3-30% of the area of printed patterns 20.
Fig. 3 and Fig. 4 illustrate the composition pattern (" substantially " pattern and " annular " pattern) that is superimposed as pattern shown in Fig. 5." pattern " expression at random or the mixture of the Points And lines of non-uniform spacing, with the natural appearance and the outward appearance of anthropomorphic dummy's iris.These Points And lines can be seen in Fig. 3-5.The pattern of stack also helps to obtain dark pattern in the Outboard Sections of iris region 25.
The printing ink that is used to obtain black pattern is based on poly-(methacrylic acid 2-hydroxyl ethyl ester), and it is a kind of hydrophilic polymer.Contain general composition in this printing ink, that is, and colorant, resin, solvent, adjuvant and crosslinking chemical.Colorant can be pigment or dyestuff.Resin is usually based on hydrophilic, methacrylic acid 2-hydroxyl ethyl ester.Though methacrylic acid 2-hydroxyl ethyl ester forms the principal ingredient of the resin of ink set, also can use other comonomer.Example comprises methacrylic acid (increasing the water-intake capacity of the ink set that uses resin), 2-ethoxyethyl methacrylate or methyl methacrylate (providing physical strength to the ink film that obtains).The physical strength of final ink film and water-intake capacity can the controls easily by changing monomer component.This ability key is to having the substrate lenses design coat system of different in moisture.Compare with traditional eyewear, disposable glasses have more moisture, and this is a common practise.By changing monomer component, persons skilled in the art can design the suitable ink set of matrix with different in moisture.Can use suitable polymerization initiator, such as, 2,2 '-azo two (isobutyronotrile), benzoyl peroxide or tert-butyl peroxide.Can () molecular wt in other words, cohesive polymers, this be well known in the art by using chain-transferring agent control resin.Suitable chain-transferring agent comprises 1-dodecyl mercaptans and 2 mercapto ethanol.Can use can be with any suitable solvent of resin material pass into solution.Usual solvents can be cyclohexanone, cyclopentanone, ethyl lactate or methyl ethyl ketone.Can use the combination of multiple solvent.Preferred solvent system is that ethyl lactate and cyclohexanone is combined.Can use auxiliary diffusion and prevent the adjuvant that pigment flocculates.Printing ink also should include the crosslinking chemical that helps obtain crosslinked networking.Cross-linking reaction will guarantee that the pigment particle is trapped in the network that obtains, and guarantee that ink lay is firmly anchored in the substrate lenses material.Common crosslinking chemical can be based on the bifunctional isocyanate.Two active groups of each isocyanate molecule will guarantee to form cross-linked network.Suitable isocyanate compound can comprise hexa-methylene isocyanates and 2, the 4-toluene-2,4-diisocyanate.Isocyanates is very active compound.End capping reaction can be used for temporarily making the isocyanates non-activity.Then, the isocyanates of passivation can be activated the cured/cross-linked after the print steps of ink printing on the glasses matrix between the reaction period.
Making the required pigment paste of printing ink can be by grinds acquisition with various batchings (except crosslinking chemical) together.Grinding can be carried out in any equipment (sand mill) that particle size reduces can making.Common processing comprises hybrid resin, (multiple) colorant, (multiple) adjuvant and (multiple) solvent, grinds the potpourri that obtains then in milling apparatus.Potpourri must pass milling apparatus (for example, sand mill) several times, so that the particle size of (multiple) pigment produces the degree that reduces that needs.Desirable final particle size is less than 3 microns.
The preparation of printing ink comprises the crosslinking chemical of the amount that adds stoichiometry (stoichiometric) in pigment paste, adds solvent then, to obtain printing viscosity.Crosslinking chemical among the present invention is based on the bifunctional isocyanate.
Colored pattern uses indirect printing (offset pad printing) and is deposited on the front surface of glasses.Pattern shown in Fig. 3-4 at first carries out etching on the corrosion resistant plate that is called " stereotype ".Also can be earlier with two combinations of patterns, etching on single corrosion resistant plate then.It is dark that circular depressed is generally the 12-18 micron.In typical printing operation, depression at first is filled printing ink, and excessive printing ink uses doctor blade to wipe off.Help printing ink is transferred to lens surface from depression with the silicone rubber sheet then, thus pattern is transferred to lens surface from stereotype.Though the invention describes the indirect printing method, persons skilled in the art are known, also can use any similar printing process.Printing ink is cured under high-temperature low-pressure/cross-linking reaction then.Also can in inert atmosphere, carry out this step effectively.The temperature magnitude is generally 100-135 ℃.If the isocyanates of end-blocking is as crosslinking chemical, then this can be the stage that compound " is separated end-blocking (decapped) ", therefore it can be reacted with the active group on the resin.If substrate lenses is based on the polymkeric substance that comprises 2-hydroxyethyl methylacrylate (2-hyroxyethyl methacrylate), then isocyanates can with the hydroxyl reaction on the lens surface.In fact, this is preferred, because it has produced the ink film that shows good adhesive property.The glasses that solidify carry out the aquation step then.The moisture glasses that obtain carry out disinfection according to the convention of medical apparatus then.
Contact lenses can and be handled and make by any suitable material well known in the art, and can be disposable.For example, contact lenses can use suitable hydrophilic polymer manufacturing.The material that is used for glasses can also be based on silicone hydrogel material.One of ordinary skill in the art can design the resin that is fit to different matrix by the monomer component that changes in the resin formula.
Though described the preferred embodiments of the present invention in the top instructions, persons skilled in the art can be recognized, without departing from the invention, carry out many changes or modification on the details of design or structure.