Prosthetic aspheric spectacle lens for aphakia

Details Prosthetic aspheric spectacle lens for aphakia Prosthetic aspheric spectacle lens for aphakia

1978-12-29

1980-01-29

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350189, G02B 304, G02C 702

Patent

active

041858972

ABSTRACT:
A prosthetic, aspheric spectacle lens for aphakic patients comprising a posterior surface and an anterior surface having a spherically curved zone and an aspheric peripheral zone surrounding the central zone. The aspheric peripheral zone has an optimized amount of radially decreasing diopter power. An alternative embodiment has a zone intermediate of the central zone and the peripheral zone. The rate of radially decreasing diopter power change accelerates as the outer circumferential edge of the lens is approached.

REFERENCES:
patent: 3781097 (1973-12-01), Bechtold
patent: 4073578 (1978-02-01), Welsh

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