Patent ID: 7625084

Claim:
A toric contact lens for correcting astigmatism of a person, comprising: a lens body including an anterior surface, a posterior surface, a peripheral edge, and a thickness defined as a distance between the anterior surface and the posterior surface, the anterior surface including a peripheral zone adjacent the peripheral edge, an inner zone circumscribed by the peripheral zone, and an optic zone circumscribed by the inner zone, wherein the inner zone has a superior border along a 90° meridian of the contact lens and an inferior border along a 270° meridian of the contact lens, and the optic zone has a superior border along the 90° meridian and an inferior border along the 270° meridian, wherein the inner zone further comprises a superior region between the superior border of the optic zone and the superior border of the inner zone, and an inferior region between the inferior border of the optic zone and the inferior border of the inner zone, wherein along a straight line representing a 225° meridian of the contact lens, the inner zone has a region of maximum thickness, wherein along the straight line, the straight line distance between the region of maximum thickness and the peripheral edge is less than about 1.8 mm, and wherein the inferior region of the inner zone includes a plurality of horizontally oriented iso-thickness bands between the inferior border of the optic zone and the inferior border of the inner zone, such that a horizontal cross-section of the contact lens through the inferior region of the inner zone along a line parallel to a horizontal meridian of the contact lens includes a region of substantially uniform thickness.