Contact lens for presbyopia

Abstract

Abstract PURPOSE:To improve the way of viewing by approximately concentrically constituting the regions of near sight parts, the regions of far sight parts, and the regions of intermediate sight parts of the diopters intermediate of the diopters of these regions in an optical part and providing plural pieces of the regions of the near sight parts and/or the regions of the far sight parts. CONSTITUTION:The optical part of the contact lens 1 is provided approximately concentrically with the regions of the near sight parts 21, 22, the regions of the far sight parts 51, 52, and the regions of the intermediate sight parts 31, 32, 41, 42 of the intermediate diopters of the diopters of these regions between the regions of the near sight parts 21, 22 and the regions of the far sight parts 51, 52. Plural pieces of the regions of the near sight parts 21, 22 and/or the regions of the far sight parts 51, 52 are provided. For example, the near sight part of -2D diopter and the 1st intermediate sight part 31 of -3D diopter on the outer side of the central part 21 thereof are provided and the 2nd intermediate sight part 41 of -4D diopter is provided on the outer side thereof. The far sight part 51 of -5D is provided on the outer side thereof. The contact lens for presbyopia which has no problems in the way of viewing even if the lens appears to move on the cornea when the lens is mounted is obtd. in this way.

Inventors

• 👤 Takeyoshi Kizu
• 👤 木津　武義
• 👤 Matsuo Hori
• 👤 堀　松男
• 👤 Hisayoshi Naito
• 👤 久義 内藤

Bibliographic Details