| 摘要 |
FIELD: physics. ^ SUBSTANCE: design of contact lenses which are useful for preventing myopia and avoid discomfort when corneal shape changes, as well as undesirable side effects during medication, which is ensured owing to that the lens, according to one of its versions, has an optical zone comprising a central zone having an essentially constant distant vision focal power, a first circular zone which is concentric with the central zone and has positive longitudinal spherical aberration, and a second circular zone which is concentric with the first circular zone. ^ EFFECT: preventing development of myopia. ^ 16 cl, 2 dwg |
