Proclear are the world's first soft monthly contact lenses with "phosphorylcholine", a natural substance. It is used in medicine (artificial arteries, etc.) because of its absolute tissue compatibility. Proclear contact lenses are considered by the eye as the body's own substance. The lenses remain evenly moist throughout the day until late at night, there is practically no feeling of dryness on the eye. Proclear are particularly suitable for screen work. Due to the electrical neutrality, the surface of the Proclear contact lens does not tend to form deposits, such as lipids and proteins from the tear film.