Method for cleaning polymeric contact lenses

Details Method for cleaning polymeric contact lenses Method for cleaning polymeric contact lenses

1984-04-04

1986-05-13

Yoncoskie, Robert

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 7, 134 42, B08B 308

Patent

active

045884447

ABSTRACT:
A process is disclosed for removing calcium containing mucin lipid proteins from polymeric contact lenses. The lenses are lightly rubbed with certain finely divided crystalline powders under light pressure. The finely divided crystalline powder employed has a critical range of particle sizes and consists essentially of sodium chloride, sodium bicarbonate, or a mixture of sodium chloride and sodium bicarbonate. The powder is free of iodide ions and other ions which irritate the human eye when in contact with a polymeric lens. The most preferred powder contains 94 weight % sodium chloride and 6 weight % sodium bicarbonate.

REFERENCES:
patent: 2024146 (1935-12-01), Crowther
patent: 2128917 (1938-09-01), Crocker
patent: 2425984 (1947-08-01), Blackman
patent: 3884826 (1975-05-01), Phares et al.
patent: 3910296 (1975-10-01), Karageozian et al.
patent: 4394179 (1983-07-01), Ellis et al.
Jorgensen, J. of Prosthetic Dentistry, "Materials and Methods for Cleaning Dentures", Dec. 1979, vol. 42, No. 6, p. 619.

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