A Study Of The In Vivo Movement Of The Dow-Corning Silsoft Contact Lens.

The requirements of a new contact lens material are many and varied. A contact lens material must fulfill optical, physical, and physiological requirements. A few of the optical and physical requirements are high transparency to visible light, stable optical quality, producability, and wettability. The major physiological requirements of a contact lens material and design are chemical inertness, and physiological tolerance with adequate wearing
time. It is a general opinion that a contact lens must influence the corneal metabolism as little as possible. One of the most important criterion is the oxygen requirement of the cornea. If the oxygen suppying the cornea drops below a critical level, the aerobic metabolism cannot be maintained and the corneal swelling occurs.