Diffractive-refractive lens system for age-related macular degeneration
| Autor: | Jim-Son Chou, Donald G. Koch, Albert C. Ting |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Retina
genetic structures business.industry medicine.medical_treatment Magnification Intraocular lens Macular degeneration medicine.disease Refractive lens eye diseases law.invention Lens (optics) Optics medicine.anatomical_structure Cataracts law Age related medicine Optometry sense organs business |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.147526 |
| Popis: | Age-related macular degeneration is a disease that affects the retina in eye of the older adult, causing central visual field loss. This can result in reduced visual acuity. A magnified image effectively appears as if the visual field loss is small relative to that image. The magnification is provided by an ocular telephoto system consisting of a diffractive and refractive hybrid spectacle lens and a dual-purpose intraocular lens. Without the spectacle lens, the intraocular lens functions as an implant for the treatment of cataracts. With the spectacle the system assists the patient in visual near tasks, such as reading or writing. The application of diffractive optics on the spectacle permits the correction of optical aberrations while reducing the size and weight of the high-power spectacle lens. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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