Abstract
The mixture of vinylaniline and 2-hydroxyethyl mrthacrylate mixed according to the mixing ratio, was allowed to stir in order to add functionality. ZnO nanoparticles, dispersed for approximately 1 hr in an ultrasonic bench top cleaner, were added to the mixture of monomers. Then the mixture at a mould was thermally polymerized to prepare high-performance hydrogel ophthalmic lens. The produced ophthalmic hydrogel lens was then put in 0.9% NaCl (normal saline solution) for 24 hrs for hydration, and various measurements were carried out. The surface analysis of ZnO nanoparticles dispersed in the macromolecular polymer was conducted using AFM (XE-100, Parks System). The produced hydrogel lens generally exhibited yellowish color, transparent and hydrophilic characteristics. Also, the contact lenses hydrated in standard saline solution generally exhibited the characteristics of flexibility and softness. The physical properties of the ophthalmic hydrogel lens material were measured. The refractive indexes of 1.359-1.423, water content of 37%-43%, and visible transmittance of 74%-82% were obtained.
Highlights
There has been active research on basic properties such as water content, wettability and tensile strength, and on functional properties such as high oxygen permeability, antimicrobial quality and UV protection, etc., in the study of contact lens materials [1,2,3,4,5,6]
The produced ophthalmic hydrogel lens was put in 0.9% NaCl for 24 hrs for hydration, and various measurements were carried out
Duker-Elder [11], Zigman [12] and others revealed their research results through animal tests under UV-B 280 - 320 nm, which demonstrated that ultraviolet rays could cause eye lens opacity
Summary
There has been active research on basic properties such as water content, wettability and tensile strength, and on functional properties such as high oxygen permeability, antimicrobial quality and UV protection, etc., in the study of contact lens materials [1,2,3,4,5,6]. Research of applying nano-composite material to contact lenses is placing a disproportionate emphasis on how to apply nano-silver and nano-gold for antimicrobial quality. The ultraviolet blocking ability of contact lenses is recently in the center of attention and is one of the very important optical properties. Ultraviolet rays can result in damage to the cornea, the retina and the eye lens. Duker-Elder [11], Zigman [12] and others revealed their research results through animal tests under UV-B 280 - 320 nm, which demonstrated that ultraviolet rays could cause eye lens opacity. Research on ultraviolet blocking contact lenses revolved around benzophenone-group substances, but recently it has been extended to other materials such as vinyl pyridine and vinylanisole [16,17]. There has been research on contact lens materials that are able to block ultraviolet rays, and infrared rays by using nanocomposites such as silicon 2,3-naphthalocyanine bis(trihexylsilyloxide) and silicon 2,9,16,23-tetra-tert-butyl-
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