| 摘要 |
A contact lens has an optical zone with a distance vision zone and a near vision zone. The distance vision zone also has a first area that is sufficie nt to overlay a substantial portion of a pupil of a user and is disposed in a first position within the optical zone so that the user's pupil is substantially subtended by the distance vision zone when the user is gazing at a substantially horizontal point. The near vision zone is substantially concentric with the rotational axis and extends radially outward from the distance vision zone. The near vision zone has a second radius of curvature that provides near vision correction and has a second area that is sufficien t to overlay a substantial portion of the pupil of a user. The near vision zon e is disposed in a second position within the optical zone so that the user's pupil is substantially subtended by the near vision zone when the user is gazing at a near vision point below the substantially horizontal point. A ridge zone enables engagement with a lower eyelid of a user so as to provide vertical translation support, and a transition zone provides a smooth transition from the ridge zone to the optical zone.
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