PROBLEM TO BE SOLVED: To provide an intraocular lens of a novel structure in which the maximum thickness dimension of an optical part can be restricted and which can be bent easily when being inserted to an eye while satisfying required optical characteristics, and a novel manufacturing method of the intraocular lens.SOLUTION: In a manufacturing method of an intraocular lens including a disc-shape optical part 12 formed of bendingly deformable soft material, an effective optical part diameter of a rear face is calculated from a predetermined effective optical part diameter of a front face on the basis of a path of an incident light beam from the front face 16 to the optical part 12. Then, by setting the effective optical part diameter of the front face and rear face, the optical part 12 is formed in such a shape that the effective optical part diameter of the rear face is smaller than the effective optical part diameter of the front face.【課題】要求される光学特性を満足しつつ、光学部の最大厚さ寸法を抑えることが可能とされて、眼内への挿入時に折り曲げやすい、新規な構造の眼内レンズおよび眼内レンズの新規な製造方法を提供する。【解決手段】曲げ変形可能な軟質材で形成されたディスク状の光学部１２を備えた眼内レンズの製造方法であって、前記光学部１２への前面１６からの入射光線の経路に基づいて、予め設定した前面の有効光学部径から後面の有効光学部径を求めて、それら前面および後面の有効光学部径を設定することにより、該前面の有効光学部径より該後面の有効光学部径を小さくした形状をもって前記光学部１２を形成することを特徴とする。【選択図】図２
