| 摘要 |
Disclosed is an ophthalmic lens element. The lens element includes a front surface and a rear surface, at least one which includes a horizontal meridian (HM) and a vertical meridian (VM). A central region of the lens element includes a foveal vision zone providing a first power for providing clear foveal vision for a wearer. A peripheral region of positive power relative to the first power is also included. The peripheral region includes dual progressive zones located bilaterally of the vertical meridian and extending radially outwardly from the central region. The lens element provides a distribution of surface astigmatism which provides, on the horizontal meridian, a relatively low surface astigmatism in the central region and the progressive zones.
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