| 摘要 |
A lens for spectacles is described which is delimited by a first and a second lens surface which are spaced apart from and located opposite each other, the first surface being arranged to face towards the inner side of the spectacles, near the face of the user when the spectacles are worn, the second opposite surface facing towards the opposite outer side of the spectacles, first cross-sectional curves being defined on the lens by the intersection of the first and second lens surfaces with a plane which is transverse to the lens and intersects a straight line joining the eyes of the user, in which the first cross-sectional curves have negative curvature with the concavity directed towards the outer side of the spectacles.
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