Progressive addition lenses

Details Progressive addition lenses Progressive addition lenses

1998-10-23

2000-11-21

Mai, Huy

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351177, G02C 706

Patent

active

06149271&

ABSTRACT:
The invention provides progressive addition lenses in which lens unwanted astigmatism is reduced and channel width through the intermediate and near vision zones is increased as compared to conventional progressive addition lenses. This result is achieved by combining two or more progressive addition surfaces, which surfaces in combination provide the dioptric add power of the lens.

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