Contact lenses with constant peripheral geometry
AssigneeJohnson & Johnson Vision Care, Inc.
InventorTimothy A. Clutterbuck
Life of this patent
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Abstract
The invention provides contact lenses. In particular, the invention relates to contact lenses in which the geometry of the lens periphery remains constant with changes in the optic zone curvature.
Claims5
A method for manufacturing contact lenses comprising the steps of:
- a.) providing a peripheral zone geometry for the contact lenses comprising slab-offs and, a slab-off gap of about 4.50 mm, an edge thickness differential of about 0.170 mm, a slab-off central diameter of about 8.00 or about 9.50 mm, and a bevel having a bevel width of about 1.00 to about 1.50 mm;
- and b.) providing subsequently two or more optic zone designs for the contact lens, wherein the peripheral zone geometry remains substantially constant.
A contact lens having a toric correction and a positive spherical correction comprising a convex outer surface, a concave inner surface, the convex surface comprising slab-offs and a slab-off gap of about 4.50 mm, an edge thickness differential of about 0.170 mm, a slab-off central diameter of about 8.00 mm, and a bevel having a bevel width of about 1.00 to about 1.50 mm.
A contact lens having a toric correction and a minus spherical correction comprising a convex outer surface, a concave inner surface, the convex surface comprising slab-offs and a slab-off gap of about 4.50 mm, an edge thickness differential of about 0.170 mm, a slab-off central diameter of about 9.50 mm, and a bevel having a bevel width of about 1.00 to about 1.50 mm.
Dependencies are inferred from the claim text.