Oxygen permeable contact lens having high durable hydrophilic surface and method for producing the same

A hydrophilic oxygen permeable contact lens having a front surface that is not to be in contact with the cornea of a human eye when said contact lens is worn on said human eye, said hydrophilic oxygen permeable contact lens being produced by a method comprising the steps of:

• preparing an aqueous solution containing 0.05.about.25% by weight of a hydrophilicity rendering material, said hydrophilicity rendering material rendering said front surface hydrophilic and consisting of hydrophilic silicone oil which is represented by the following formula and whose viscosity at a temperature of 20.degree. C. is not higher than 5,000 centipoise;
• coating at least the front surface of an oxygen permeable contact lens with said hydrophilicity rendering material, by contacting said contact lens with said aqueous solution containing said hydrophilicity rendering material;
• and
• drying said contact lens whose front surface has been coated with said hydrophilicity rendering material:
• ##STR8## where, p:
• 5.about.200
• q:
• 0.about.50, r:
• 0.about.50, q+r.gtoreq.1,
• R.sub.1 .about.R.sub.10 :
• alkyl group having 1.about.4 carbon atoms or phenyl group, each of R.sub.1 .about.R.sub.10 being in different groups or in the same group, ##STR9## where, m:
• 0.about.1, n:
• 1.about.20,
• R.sub.13 :
• alkyl group having 1.about.30 carbon atoms or aryl group, ##STR10## and where, R.sub.14 :
• alkyl group having 1.about.20 carbon atoms.