| bifocal lens |
Vision correction lens that comprises two parts: the upper part for distance vision and the lower part for near-vision tasks such as reading. The distance vision correction can have no correction at all. The segment for near-vision correction can be a half-moon shape, round, rectangular, or the bottom half of the lens. See Prescription Eyewear in Eye Care Encyclopedia.
출처: www.visionrx.com/library/dictionary/eye_dictionary...
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| bifocal lens |
Spectacle lens having two portions with different focusing power. The top portion is usually larger and used for distance vision while the lower portion is smaller and used for near vision.
출처: www.cf.ac.uk/optom/DownsSyndromeGroup/glossary.htm...
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