Pupil-tuned multifocal ophthalmic lens

Details Pupil-tuned multifocal ophthalmic lens Pupil-tuned multifocal ophthalmic lens

1992-12-09

1995-09-05

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351177, G02C 704

Patent

active

054483123

ABSTRACT:
An ophthalmic lens provides a cumulative ratio of distance to near focal length that is predominantly distance correction under high illumination, nearly evenly divided under moderate illumination, and favoring again distance vision correction under low level illumination. The lens is specifically adjusted to match the patient's pupil size as a function of illumination level, in the preferred embodiment by applying pupil size parameters as a function of age. This lens has the properties of matching both the distribution of near and distance focal vision correction to the type of human activity typically undertaken in various illumination conditions, as well as matching particular lens dimensions to suit the size of the pupil as a function of illumination intensity.

REFERENCES:
patent: 4704016 (1987-11-01), de Carle
patent: 4890913 (1990-01-01), De Carle et al.
patent: 4923296 (1990-05-01), Erickson
patent: 5002382 (1991-03-01), Seidner
patent: 5024517 (1991-06-01), Seidner
patent: 5054905 (1991-10-01), Cohen
patent: 5151723 (1992-09-01), Tajiri

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