What is Black Sclera Crazy Lenses?
A contact lens Black Sclera (also known as “contact”, for short) is a corrective or cosmetic Black Sclera lens placed on the cornea of the Black Sclera eye atop the iris. Contacts can Black Sclera come in a number of varieties, Black Sclera including hard and soft (extended-wear and disposable, respectively). The most commonly Black Sclera used contact lenses today, however, are of the Crazy Lenses soft variety, invented in 1961 Black Sclera by the Czech chemist Otto Wichterle (1913–1998). Contact lenses (both soft and hard) Black Sclera are made of various types of polymers, Crazy Lenses usually containing some Crazy Lenses variant of silicone Black Sclera hydrogel. Previously, hard contact lenses Crazy Lenses were made of a polymer known as PMMA. They Black Sclera have since been replaced by rigid gas-permeable Black Sclera (RGP) contact lenses. Many contact lenses are made of Black Sclera hydrophilic (water-absorbing) materials, thereby Black Sclera allowing oxygen to reach the corn
