| 摘要 |
<p>An ophthalmic lens includes a refractive surface(2) partitioned into a first area(5), a second area(3) located above the first area(5) and a third area(4) located below the first area(5). The first area(5) includes a reading point(A) providing a first refractive focal power on a meridional line(S). The second area(3) provides a surface refractive focal power less than that of the reading point(A), and the third area(4) provides a surface refractive focal power stronger than that of the reading point(A). The refractive focal power in the first area(5) progressively changes between the second and third areas(3,4). The first area(5) includes a quasi-clear vision area that has a maximum horizontal width in the proximity of the geometrical center(O) of the lens and a clear vision area(6). <IMAGE></p> |
