F3 contact lenses from Bausch and Lomb are manufactured for optimum comfort and clarity.  They are worn as daily wear lenses for up to a year and replaced.  F3 contacts have the benefit of having the focus power sitting right on your eye's lens to negate any peripheral vision difficulties.

Lens Material
The lens material (polymacon), is a hydrophilic polymer of 2-hydroxyethyl methacrylate, and is 38.6% water by weight when immersed in saline solution. These lenses are hemispherical flexible shells.