The principle of Optical glasses

03/28/2011 13:16

 The principle of optical glasses:

Using lenses, prisms, contact lenses, intraocular lenses and other glasses to correct vision and eliminate eye fatigue, protect or treatment eyes. There are many types of glasses; correct refractive glasses can be divided into optical glasses and contacts glasses. In addition, there are a variety of protective glasses, cosmetic glasses and visual aids low vision correction glasses in the market. All lenses of these glasses are thin lenses.

If you need any special glasses, you can go to the glasses stores or hospital to buy the glasses you want. Usually, the glasses you buy in stores is cheaper compared with those in hospital, because commonly the Shopkeeper of the glasses stores will give you discount.