Contact lens wetting solution
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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app pub date -
Feb 21, 2003
filing date -
Aug 22, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Contact lens wetting solutions for reducing friction between the contact lens and ocular tissues, and maintaining such effect for a long time, are disclosed. The wetting solution is composed only of a particular ratio of a lubricant composed of copolymer (A) obtained by polymerizing a monomer composition comprising 2-(meth)acryloyloxyethyl phosphorylcholine and alkyl(meth)acrylate, a buffer, an inorganic chloride, a preservative, a chelating agent, and water. The copolymer (A) has a weight average molecular weight of 100,000 to 1,000,000, and satisfies the formula 80.ltoreq.N.times.R.ltoreq.240, provided that 4.ltoreq.N.ltoreq.18 and 10%.ltoreq.R.ltoreq.60%, wherein N stands for the carbon number of the alkyl group in monomer Y constituting copolymer (A), and R stands for a molar fraction of the unit derived from monomer Y with respect to the sum of the units derived from monomers X and Y.
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