Contact lens and method for manufacturing the same

A method for manufacturing a contact lens using a cast mold manufacturing method, the contact lens having a convex front surface and a concave rear surface,

• the front surface being divided into an optical portion, an edge joining the front and rear surfaces, a first smoothing portion arranged on an outer periphery of the optical portion, a peripheral portion arranged on an outer periphery of the first smoothing portion, and a second smoothing portion connecting the peripheral portion and the edge,
• the front surface having mirror image symmetry with respect to a vertical meridian as a boundary extending from an upper end of the lens to a lower end of the lens passing through a midpoint of the lens, and having mirror image symmetry also with respect to the horizontal meridian perpendicular to the vertical meridian at the lens midpoint,
• the peripheral portion being arranged to include the horizontal meridian, and configured of:
• a first peripheral portion arranged to include the horizontal meridian and having a shape so as to maximize a thickness of the contact lens on the horizontal meridian,
• a second peripheral portion arranged to include the vertical meridian and having a shape so as to minimize the thickness of the contact lens on the vertical meridian,
• a first peripheral auxiliary portion which is a portion adjacent to the first peripheral portion, having a surface shape so as to keep the thickness of the contact lens constant;
• and
• an inclined portion which is a portion connecting the first peripheral auxiliary portion and the second peripheral portion to form a continuous surface, and having a surface shape that changes the thickness of the contact lens.