Patent ID: 9574160
Date: 2017-02-21
CPC Classifications: A45C,A61F,A61P,B65D,C11D

Claim:
1. A method of treating a contact lens to modify the surface characteristics of the lens or clean the lens, which comprises applying to a silicone hydrogel contact lens an ophthalmic composition comprising 0.01 to about 1 weight/volume percent of at least one poly(oxyethylene)-poly(oxybutylene) block copolymer wherein the poly(oxyethylene)-poly(oxybutylene) block copolymer is of the formula (EO)m(BO)n, wherein m is an integer having an average value of 20 to 45 and n is an integer having an average value of 5 to 14 and m is greater than n, having a molecular weight in the range of 500 to 100,000 Daltons and an ophthalmically acceptable vehicle therefor.