Contact lens wetting solution

A method of inserting a contact lens comprising the steps of:

• instilling a wetting solution over a contact lens prior to lens insertion, said wetting solution consisting of:
• 0.05 to 5% w/v of a lubricant consisting of copolymer (A) obtained by polymerizing a monomer composition comprising 2-(meth)acryloyloxyethyl phosphorylcholine represented by the formula (1) and alkyl(meth)acrylate represented by the formula (2),
• 0.1 to 1.5% w/v of a buffer,
• 0.1 to 1.5% w/v of an inorganic chloride,
• 0.00001 to 0.1% w/v of a preservative,
• 10−4 to 0.1% w/v of a chelating agent, and water,
• wherein said copolymer (A) has a weight average molecular weight of 100,000 to 1,000,000, and satisfies the formula 80≦N×R≦240, provided that 4≦N≦18 and 10%≦R≦60%, wherein N stands for a carbon number of an alkyl group in said alkyl(meth)acrylate represented by the formula (2) constituting copolymer (A), and R stands for a molar fraction of a unit derived from said alkyl(meth)acrylate represented by the formula (2) with respect to the sum of units derived from said 2-(meth)acryloyloxyethyl phosphorylcholine represented by the formula (1) and said alkyl(meth)acrylate represented by the formula (2):
• wherein R1 stands for a hydrogen atom or a methyl group,
• wherein R2 stands for a hydrogen atom or a methyl group, and R3 stands for an alkyl group having 4 to 18 carbon atoms, and
• putting the lens on the eye.

A method of using a contact lens wetting solution comprising the steps of:

• instilling a contact lens wetting solution over a contact lens prior to lens insertion, said wetting solution consisting of:
• 0.05 to 5% w/v of a lubricant consisting of copolymer (A) obtained by polymerizing a monomer composition comprising 2-(meth)acryloyloxyethyl phosphorylcholine represented by the formula (1) and alkyl(meth)acrylate represented by the formula (2),
• 0.1 to 1.5%w/v of a buffer,
• 0.1 to 1.5% w/v of an inorganic chloride,
• 0.00001 to 0.1% w/v of a preservative,
• 10−4 to 0.1% w/v of a chelating agent, and
• water,
• wherein said copolymer (A) has a weight average molecular weight of 100,000 to 1,000,000, and satisfies the formula 80≦N×R≦240, provided that 4≦N≦18 and 10≦R≦60%, wherein N stands for a carbon number of an alkyl group in said alkyl(meth)acrylate represented by the formula (2) constituting copolymer (A), and R stands for a molar fraction of a unit derived from said alkyl(meth)acrylate represented by the formula (2) with respect to the sum of units derived from said 2-(meth)acryloyloxyethyl phosphorylcholine represented by the formula (1) and said alkyl(meth)acrylate represented by the formula (2):
• wherein R1 stands for a hydrogen atom or a methyl group,
• wherein R2 stands for a hydrogen atom or a methyl group, and R3 stands for an alkyl group having 4 to 18 carbon atoms, and
• putting the lens on the eye to bring the wetting solution into contact with ocular tissues.