Patent ID: 8985764
Filing Date: 2015-03-24
Classification: G02C

Abstract:
1. A contact lens comprising: a central optical zone having no deviation of a center of gravity by a prism; a peripheral zone surrounding the optical zone; a pair of thin portions that are each disposed in the peripheral zone and extend in a circumferential direction, with a constant thickness, on upper and lower sides of the lens during wear; a pair of thick portions that are each disposed in the peripheral zone and extend in the circumferential direction, with a larger thickness than the thin portions, on left and right sides of the lens during wear; and at least one concavity between a first protrusion and a second protrusion of the contact lens such that the concavity and the first and second protrusions are disposed on a posterior surface of each of the pair of thick portions, respective concavities of the at least one concavity being positioned symmetrically in a left-right direction during wear, wherein a minimum thickness at a portion where the at least one concavity is disposed is larger than the thickness of the thin portions.