PROBLEM TO BE SOLVED: To make it possible to exert a pinhole effect and block irregular incidence of light caused by keratoconus cornea or irregular astigmatism by a sunglass effect.SOLUTION: A contact lens has: two light shielding part bodies 18a,18b having different light-shielding rates which consist of a light shielding material including a translucent member and a pinhole 12 which is provided at the position of the light shielding part body 18a including an optical axis connecting the center of a cornea and the center of a retina and allows incident light to pass therethrough. The light shielding part body 18b is arranged on the outer periphery of the light shielding part body 18a, a light-shielding rate of the light shielding part body 18a is set within a range of a light-shielding rate where a pinhole effect that light passing through the pinhole 12 advances straight without curving and passes on the original focal point on the retina is obtained, and a light-shielding rate of the light shielding part body 18b is set within a range of a light-shielding rate where a sunglass effect that the light shielding part body 18b weakens light energy of at least one of blue-based light and yellow-based light to block the incidence of light having a specific wavelength is obtained.COPYRIGHT: (C)2015,JPO&INPIT【課題】ピンホール効果を発揮できて、しかも、サングラス効果によって、円錐角膜や不正乱視を原因とする不規則な光の入射を阻止できるようにする。【解決手段】半透明性の部材を含む遮光材料からなる遮光率の異なる2つの遮光部本体18a,18bと、角膜の中心と網膜の中心とを結ぶ光軸を含む遮光部本体18aの位置に設けられ、入射光を透過させるピンホール12を有し、遮光部本体18aの外周囲に遮光部本体18bが配置され、ピンホール12を通る光が曲らずに直進し網膜上の本来の焦点上も通過するというピンホール効果が得られる遮光率の範囲内に遮光部本体18aの遮光率が設定され、遮光部本体18bが青色系及び黄色系の少なくともいずれか一方の光エネルギーを弱めて特定の波長の光の入射を阻止するというサングラス効果が得られる遮光率の範囲内に遮光部本体18bの遮光率が設定されるものである。【選択図】 図1
