Process for hydrating soft contact lenses

Details Process for hydrating soft contact lenses Process for hydrating soft contact lenses

1990-04-17

1992-01-14

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Nonmechanical aftertreatment

206 51, 264 17, 264 23, 264344, B29D 1100

Patent

active

050808397

ABSTRACT:
A process for releasing leachable substances from a polymeric contact lens blank. the contact lens is confined in a cavity within a carrier to permit the hydration of the lens without permitting it to invert or roll over. A fluid flow is introduced into the cavity about the lens to extract leachable material from the lens. The process significantly reduces the amount of leaching fluid that is used and the amount of time that is needed for hydration, washing and extraction.

REFERENCES:
patent: 3115146 (1963-12-01), Erwin
patent: 4495313 (1985-01-01), Larsen
patent: 4565348 (1986-01-01), Larsen
patent: 4640489 (1987-02-01), Larsen
patent: 4807750 (1989-02-01), Ryder et al.
patent: 4860885 (1989-08-01), Kaufman et al.
patent: 4890729 (1990-01-01), Ramalletta

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