| 摘要 |
An intraocular lens has an optical axis, a central zone and a peripheral zone which are substantially symmetrical with respect to the optical axis and which extend substantially perpendicular thereto, the central zone extending to a first distance, and the peripheral zone extending from the first distance to the end of the intraocular lens, wherein the central zone has a nominal optical power, and the peripheral zone has a radius of curvature which varies continuously and monotonously as a function of the distance to the optical axis, so that a target asphericity value is obtained at a second distance relative to the optical axis, the first distance and the second distance being calculated from a photopic pupil diameter and a mesopic pupil diameter, respectively, of a patient. |
| 主权项 |
1. Intraocular lens, characterised in that it has an optical axis (y), a central zone (Z1), and a peripheral zone (Z2, Z3, Z4) which are substantially symmetrical with respect to said optical axis (y) and which extend substantially perpendicular thereto, said central zone (Z1) extending to a first distance (Pp/2) and the peripheral zone (Z2, Z3, Z4) extending from the first distance (Pp/2) to the end of the intraocular lens, wherein the central zone (Z1) has a nominal optical power, and the peripheral zone (Z2, Z3, Z4) has a radius of curvature which varies continuously and monotonously as a function of the distance (x) to the optical axis (y), so that a target asphericity value is obtained at a second distance (De) relative to the optical axis (y), the first distance (Pp/2) and the second distance (De) being calculated from a photopic pupil diameter (Pp) and a mesopic pupil diameter (Pm), respectively, of a patient. |
