Method for making multifocal ophthalmic lens

Details Method for making multifocal ophthalmic lens Method for making multifocal ophthalmic lens

1984-03-23

1986-03-18

Schor, Kenneth M.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 37, 65 38, 351168, 351177, C03C 2100

Patent

active

045766231

ABSTRACT:
A laminated multifocal prescription ophthalmic lens is provided comprising a plano (zero power) cap element incorporating a convergent near-vision multifocal segment, the cap being cemented to a prescription-ground single vision base element. The back surface curvature of the base is configured to provide prescribed sphere, cylinder and other vision-corrective refraction characteristics to the laminated lens.

REFERENCES:
patent: 1948636 (1934-02-01), Tillyer
patent: 2640299 (1953-06-01), Sheard et al.
patent: 2958162 (1960-11-01), Upton
patent: 3877798 (1975-04-01), Tolar et al.
patent: 3975093 (1976-08-01), Upton
patent: 3997249 (1976-12-01), Krohn et al.
patent: 4498919 (1985-02-01), Mann

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