| 摘要 |
<p>A pair of multifocal contact lenses comprises a first corneal contact lens (10) having a convex anterior surface (14) formed with a power curve having exactly two vision correction zones: a circular distance vision zone (18) and an annular intermediate vision zone (20) contiguous with and concentric or coaxial with the distance vision zone (18). A second corneal contact lens (24) of the pair also has a convex anterior surface (28) formed with a power curve having exactly two vision correction zones: a circular near vision zone (32) and an annular intermediate vision zone (34) contiguous with and concentric or coaxial with the near vision zone (32). The intermediate vision zone (20) of the first lens (10) and the distance vision zone (18) have optical powers differing in magnitude by less than approximately 1.5 diopters. Similarly, the intermediate vision zone (34) of the second lens (24) and the near vision zone (32) have optical powers differing in magnitude by less than approximately 1.5 diopters.</p> |
