| 摘要 |
The invention relates to a progressive ophthalmic lens comprising a front surface and a rear surface, each surface having in each point an altitude, a mean sphere value (and a cylinder value, the front surface of the lens comprising:
- a far vision zone having a far vision reference point ;
- a near vision zone having a near vision reference point ;
- a main meridian,
wherein the front surface is regressive and has:
- a sphere gradient normalized value of less than 7.50.10 -1 mm -1 at any point in a central portion of the lens including a portion of the main meridian (32), the far vision reference point (FV) and the near vision reference point (NV);
- a cylinder gradient normalized value of less than 1.45 mm -1 at any point in the central portion of the lens |
