J Korean Ophthalmol Soc.
2000 Sep;41(9):1960-1967.
The Usefulness of Aspheric Doublet Lens
- Affiliations
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- 1Department of Ophthalmology, National Medical Center, #18-79 Ulchiro-6-ga, Cheong-ku, Seoul, 100-196, Korea.
Abstract
- Ideal low vision devices used for reading should have a large clear field of view.To determine the usefulness of Aspheric Doublet Lens, we compared visual field, image clarity and reading speed of aids in 100 patients who were prescribed with Aspheric doublet lens, Telemicroscope with plus cap and Hand held magnifier.Aspheric doublet lens was prescribed most commonly.Used lens of optical aids was aspheric doublet lens, aplantic lens, biconvex lens and aspheric lens.Visual field and image clarity of Aspheric doublet lens were wider and clearer than those of other devices.Reading speed of each aid after prescription was improved significantly than before prescription (P=0.01).Reading speed of Aspheric doublet lens was more improved than that of other devices.Therefore Aspheric doublet lens might be useful as reading aids to low vision patients.
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