Newer designs of aphakic spectacle eyeglasses

This paper discusses the four available types of plastic aphakic spectacle lenses, which include (1) nonaspheric nonlineticular, (2)hardly aspheric lenticular and moderately aspheric lenticular, (3) mildly aspheric nonlenticular, and (4) highly aspheric nonlenticular in much larger eye size but adjusted closer to the eye to produce an enlarged visual field and suppress the "jack-in-the-box" phenomenon. Absolute size of the refracted peripheral visual fields through these types will be compared for the stationary eye in primary fixation. These visual fields were performed on the Amark projection perimeter. Helpful hints will be presented on how to determine if the patient has obtained the types of lenses prescribed and how to best prescribe each of these lenses.