Progressive addition lenses with varying power profiles
AssigneeJohnson & Johnson Vision Care, Inc.
InventorEdgar Menezes
Life of this patent
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Abstract
The invention provides lenses, as well as methods for their design and production, in which the power distribution between the distance and near vision zone substantially meets the requirements of the wearer's eye path and refractive power. This power distribution is obtained without introducing additional unwanted astigmatism.
Claims21
A spectacle lens comprising a first surface having a first channel and a first channel power profile and a second surface having a second channel and a second channel power profile, wherein the channel power profile of the lens is the vector sum of the channel power profiles and the first channel and the second channel are displaced.
A spectacle lens comprising a first surface having a first channel and a first channel power profile and a second surface having a second channel and a second channel power profile, wherein the channel power profile of the lens is the vector sum of the channel power profiles and wherein the first channel and the second channel are displaced about 0.1 mm to about 20 mm.
A method for producing a spectacle lens comprising the steps of:
- a.) measuring a lens wearer's eye path and refractive power requirement while the wearer is viewing an object at a distance, an intermediate, and a near position;
- and b.) providing a lens with a channel power profile based on the lens wearer's eye path and refractive requirement.
Dependencies are inferred from the claim text.