System for stabilizing lacrimal fluid layer

Details System for stabilizing lacrimal fluid layer System for stabilizing lacrimal fluid layer

2006-12-12

2006-12-12

Azpuru, Carlos A. (Department: 1615)

Drug, bio-affecting and body treating compositions

Topical body preparation containing solid synthetic organic...

Ophthalmic preparation

Reexamination Certificate

active

07147844

ABSTRACT:
A purpose of the present invention is to remove dryness and unpleasantness in eyes of contact lens wearers and to obtain favorable moist feel and wearing feel by stabilizing a lacrimal fluid layer on the surface of eyeballs of the wearers. By using an ophthalmic composition containing polyvinyl pyrrolidone, the lacrimal fluid layer existing on ionic contact lenses can be stabilized via adsorption of polyvinyl pyrrolidone on the ionic contact lenses. By adding a viscosity-increasing agent to the ophthalmic composition, the lacrimal fluid layer can be maintained in a stable state over a long period of time.

REFERENCES:
patent: 3959102 (1976-05-01), Wajs et al.
patent: 5591426 (1997-01-01), Dabrowski et al.
patent: 6180093 (2001-01-01), De et al.
patent: WO 98/11875 (1998-03-01), None
patent: WO 98/32421 (1998-07-01), None

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