| 摘要 |
<p>A contact lens (20) having a rotational stabilization mechanism thereon, and a thickness profile that reduces the torque imparted on the lens by the action of the eyelids. The prism ballast is provided on one or more portions of the anterior face of the lens such that the lens body has a uniform thickness of within 10% along horizontal cross-section. The anterior face of the lens may be segregated into a peripheral zone (24), an inner zone (26) circumscribed by the peripheral zone (24), and a central optic zone (22). The prism ballast portion is provided within the inner zone (26), which may be further subdivided into a superior portion (40), an intermediate portion (44) proximate the optic zone (22), and an inferior portion (48). The ballast portion increases in thickness along a superior-inferior line parallel to a vertical meridian, and has a substantially uniform thickness perpendicular thereto.</p> |
