an improved soft contact lens material , existing as a hydrogel , is formed by a polymer containing a fluorinated monomer , a hydroxyalkyl ester of acrylic or methacrylic acid , and an n - vinyl lactam . the polymer may also contain other hydrophilic and / or hard hydrophobic monomers , crosslinking agents , and uv - absorbing agents . contact lenses made of these combinations have high water of hydrations , are highly wettable , have extremely high oxygen permeabilities and are resistant to protein deposits and other forms of attached debris .