Bleaching and dyeing; fluid treatment and chemical modification – Nontextile – dyeing process or product – including inorganic... – Contact lens
Patent
1987-08-12
1988-10-18
Clingman, A. Lionel
Bleaching and dyeing; fluid treatment and chemical modification
Nontextile, dyeing process or product, including inorganic...
Contact lens
351160R, 351160H, 351161, 351162, 351177, D06P 300, G02C 704
Patent
active
047776846
ABSTRACT:
Presented is a method and apparatus for custom tinting soft contact lenses in the dispensing office prior to dispensing such lenses to the wearer, or even after they have been dispensed and worn for a time. In the past, contact lenses have been tinted by mass production means by a very limited number of manufacturers. In one aspect, this invention presents a device that can be used by a dispensing optician, optometrist or ophthalmologist to custom tint soft contact lenses to the specification of the wearer while the wearer waits for the lenses to be tinted. In terms of structure, the apparatus comprises a hand-held device into which a soft contact lens may be deposited and sealed and subjected to the chemical reaction of an appropriate dye to tint the contact lens to the requisite color. The lens is held contained within the device for requisite time to secure adequate reaction of the dye stuff with the material from which the lens is manufactured, and subsequently the dye is flushed from the apparatus and the lens removed.
REFERENCES:
patent: 4518390 (1985-05-01), Rabenau et al.
patent: 4553975 (1985-11-01), Su
patent: 4634449 (1987-01-01), Jenkins
patent: 4705370 (1987-11-01), Johnson
Clingman A. Lionel
Leavitt John J.
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