An intraocular telescopic lens for macular degeneration.
Age-related macular degeneration is a leading cause of visual loss in adults older than 60 years of age. Once vision has been seriously compromised, the only means of improving visual function are optical devices that produce magnification of images. These devices fall into three categories: (1) high-plus lenses, (2) external telescopes, and (3) a high-minus center intraocular lens combined with external high-plus glasses. The authors designed a new intraocular lens with an entire telescope in its center. In vitro tests were performed to evaluate modulation transfer function, visual field, and optical aberrations. Implantation in cadaver eyes was performed to test the surgical technique and safety. Test results showed that satisfactory modulation transfer function and optic aberration were achieved, and implantation in cadaver eyes was proven to be feasible and safe. It was concluded that a fully implanted intraocular telescopic lens is an effective optical solution for age-related macular degeneration.
Lipshitz
I
I
Department of Ophthalmology, Ichilov Hospital, Tel-Aviv, Israel.
Loewenstein
A
A
Reingewirtz
M
M
Lazar
M
M
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002102:Cadaver; D002387:Cataract Extraction / Q000379:methods; D004867:Equipment Design; D006801:Humans; D007910:Lenses, Intraocular / Q000295:instrumentation*; D008268:Macular Degeneration / Q000601:surgery*; D008875:Middle Aged; D055096:Optical Devices; D055095:Optics and Photonics; D012029:Refraction, Ocular