Truncated translating contact lens with optimized performance and method of design
AssigneeJohnson & Johnson Vision Care, Inc.
InventorsPierre-Yves Gerligand, Gregory J. Hofmann, Philippe F. Jubin, Shahrokh Zeinali-Davarani
Life of this patent
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Abstract
Translating contact lenses which are truncated for correcting presbyopia and whose design is optimized to maximize translation ability while maintaining comfort when the lens is worn on eye. Truncation of the lenses results in a non-round geometry while still retaining under-lid residency in select portions of the lens itself. Maximum thickness and back surface radius of curvature along with ramp shape can be optimized individually or in combination to maximize translation of the lens relative to the eye, when the lens is positioned on eye.
Claims18
A truncated translating contact lens, the lens comprising:
- an inner optic zone having at least both a first vision correction region, and a second vision correction region, the first vision correction region being superior in position to the second vision correction region and configured for correcting far vision needs, the second vision correction region being inferior in position to the first vision correction region and configured for correcting near vision needs;
- an outer peripheral zone surrounding the inner optic zone and configured for providing maximum translation of the contact lens on eye;
- the outer peripheral zone having a back surface radius of curvature and a variable thickness variation wherein said variable thickness variation is 0.3 mm or less within the outer peripheral region.
A truncated translating contact lens, the lens comprising:
- an inner optic zone having at least both a first vision correction region, and a second vision correction region, the first vision correction region being superior in position to the second vision correction region and configured for correcting far vision needs, the second vision correction region being inferior in position to the first vision correction region and configured for correcting near vision needs;
- an outer peripheral zone surrounding the inner optic zone and configured for providing maximum translation of the contact lens on eye;
- the outer peripheral zone having a variable thickness variation wherein said variable thickness variation is 0.3 mm or less within the outer peripheral region and the outer peripheral zone further comprising an inferior portion, a superior portion, and an intervening transition portion located between the inferior and superior portions.
A truncated translating contact lens, the lens comprising:
- an inner optic zone having at least both a first vision correction region, and a second vision correction region, the first vision correction region being superior in position to the second vision correction region and configured for correcting far vision needs, the second vision correction region being inferior in position to the first vision correction region and configured for correcting near vision needs;
- an outer peripheral zone surrounding the inner optic zone and configured for providing maximum translation of the contact lens on eye;
- the outer peripheral zone having a nonuniform back surface radius of curvature and a variable thickness variation wherein said variable thickness variation is 0.3 mm or less within the outer peripheral region and the outer peripheral region further comprises an inferior portion, a superior portion, and an intervening transition portion located between the inferior and superior portions wherein thickness variations and back surface radius of curvature changes are smooth and continuously blended throughout the peripheral region and further comprising a ramp portion having a maximum thickness and a ramp shape selected from the group consisting of concave, convex and linear shapes wherein said ramp portion is positioned such that the maximum thickness of the ramp portion is located within the inferior portion of the peripheral region.
Dependencies are inferred from the claim text.