The teachers and investigators of Faculty of chemistry of
Our research team synthesized acrylic quaternary copolymer which has high tougness, transparence, transmittance of oxygen and is stable, and applied it as a material of soft contact lense.
Contact lense is important for protecting eyes and improving thier vision. It is a very thin, transparent lense that is made as to be contacted to cornea of eye, and the other people can't notice whther he wears it or not. And also he can take off and wear freely at any time.
Now, quite a few people suffer from vision disorder with myopia or astigmatism due to genetic or acquired reasons, so they are forced to wear spectacles.
Wearing spectacles cause a little inconvenience to some people with different jobs. Especially, for sportmen, young people and children, it is so inconvenient from the active point of view.
Contact lense was developed in order to not only allow people to take off these classical spectacles fully or partially but also correct their vision and support their convenience.
To develop the soft contact lense material and artifical cornea ourselves, which doesn't stimulate cornea and conjunctiva and doesn't feel as foreign matter, has high penetrability for tear and oxygen, is useful for wearing for a long time, arise as a realistic demand of our country and also very important in raising up the science and technology to advanced level.
Our research group established the synthetic method for acrylic quartanary copolymer and its optimal condition, and studied its applicability as a soft contact lense material on the basis of testing the characteristics of film. Also we analized the optical and absoption behavior of material and confirmed its reliability through clinical test to open the way of the preparation of contact lense.
The soft contact lense made of acrylic quaternary copolymer we developed, of which visible light transmittance under the hydrate state is 98%, refractive index is 1.5 and more, water absorption is 38.5%, breaking tensile strength is 6.68Mpa and breaking elongation percentage is 174%, has good transparence and physical-mechanical strength, biocompatability, so its efficiency is very high.
