Simultaneous vision ophthalmic lens for correcting presbyopia an

Details Simultaneous vision ophthalmic lens for correcting presbyopia an Simultaneous vision ophthalmic lens for correcting presbyopia an

1994-01-27

1996-06-25

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351168, G02C 706

Patent

active

055304915

ABSTRACT:
To define a far vision area and a near vision area in a simultaneous vision ophthalmic lens for correcting presbyopia, the curve representing the proximity as a function of the distance from the axis lies within an area between a lower envelope curve and an upper envelope curve with associated specific polynomial equations in which the coefficients depend on the proximity addition corresponding to the degree of presbyopia of the wearer. Either the far vision area or the near vision area is strengthened relative to the other, the corresponding surface areas S.sub.VL, S.sub.VP being related as follows:

REFERENCES:
patent: 4784482 (1988-11-01), Guilino
patent: 4976534 (1990-12-01), Miege
patent: 5002382 (1991-03-01), Seidner
patent: 5139325 (1992-08-01), Oksman

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