Ophthalmic solutions and methods for improving the comfort and safety of contact lenses

Abstract From the Canadian patent

Ophthalmic solutions and methods for improving the comfort and safety of contact lenses, Abstract, An ophthalmic solution for improving the exchange of fluid in the area outside a hydrogel contact lens with the fluid in the area underneath the hydrogel contact lens comprising: (a) a hydrogel contact lens flattening agent in an amount from 0.0005 % by weight to an amount equivalent to 330 milliosmoles/kg, optionally, (b) an ophthalmically acceptable ionic salt in an amount sufficient to render said solution substantially isotonic and, (c) an ophthalmically acceptable viscosity enhancing agent sufficient to cause the composition to have a Brookfield relative viscosity of 3 to 50 cps. The …