An intraocular lens (10, 58, 62, 70, 78) of the type of a piece comprising: an optical portion (12) generally circular in a frontal view and includes a lens area having prescribed optical characteristics； and support portions (16, 60, 64, 72, 80) that extend radially outward from the optical portion (12), and which, with the lens (10, 58, 62, 70, 78) inserted into one eye , are arranged in contact with an inner surface of an outer circumferential part of a capsule, thereby maintaining the optical portion (12) placed inside the capsule, the optical portion (12) and the portions (16, 60, 64, 72, 80) of support are integrally formed with a soft folding or rolling material, characterized in that a viscous material is used as the soft material, and there are formed portions (32) of viscosity reduction that have irregularities only in the projecting distal end portions (76) of the rear faces (28) of the support portions in a longitudinal direction (16, 60, 64, 72, 80), so as to reduce the viscosity of the rear faces (28) of the protruding distal end portions (76) of the portions It is (16, 60, 64, 72, 80) of support that are adapted to be superimposed on the optical portion (12) when the lens (10, 58, 62, 70, 78) is folded or rolled and inserted into the eye.Una lente intraocular (10, 58, 62, 70, 78) del tipo de una pieza que comprende: una porción óptica (12) de forma generalmente circular en una vista frontal e incluye una zona de lente que tiene características ópticas prescritas； y porciones (16, 60, 64, 72, 80) de soporte que se extienden radialmente hacia fuera desde la porción óptica (12), y que, con la lente (10, 58, 62, 70, 78) insertada en un ojo, están dispuestas en contacto con una superficie interior de una parte circunferencial externa de una cápsula, manteniendo, de ese modo, la porción óptica (12) colocada en el interior de la cápsula, la porción óptica (12) y las porciones (16, 60, 64, 72, 80) de soporte están formadas integralmente con un material blando
