| Franklin spectacles | An early form of bifocal spectacles in which the lower half of the lens is for near vision, the upper half for distant vision. Synonym: divided spectacles. (05 Mar 2000) |
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| Hollander, Franklin | <person> U.S. Physiologist, 1899-1966. See: Hollander test. (05 Mar 2000) |
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| Ladd-Franklin | Christine, U.S. Psychologist, 1847-1930. See: Ladd-Franklin theory. (05 Mar 2000) |
| Ladd-Franklin theory | A theory, pertaining to colour vision, that gray is the earliest of colour sensations, from which are derived, by molecular change, two paired substances that, respectively, detect yellow and blue, and that the yellow gives rise to paired substances for detection of red and green. Synonym: Ladd-Franklin theory. (05 Mar 2000) |
| Franklin, Benjamin | <person> U.S. Physicist and statesman, 1706-1790. See: franklinic, Franklin spectacles. (05 Mar 2000) |
| Franklin, Edward | <person> U.S. Physician, *1928. See: Franklin's disease. (05 Mar 2000) |
| Franklin's disease | gamma-heavy-chain disease |
| bifocal spectacles | Spectacles with bifocal lenses. See: lens. (05 Mar 2000) |
| pantoscopic spectacles | Spectacles, used for reading, in which the upper portion of the lenses are removed. Synonym: clerical spectacles, pantoscopic spectacles, pulpit spectacles. (05 Mar 2000) |
| Masselon's spectacles | Spectacles with little offsets of metal with smooth edges which engage above the upper eyelid and keep it raised above the pupil in cases of paralytic blepharoptosis. Synonym: Masselon's spectacles. (05 Mar 2000) |
| photochromic spectacles | Spectacles with lenses that darken on exposure to ultraviolet light. (05 Mar 2000) |
| clerical spectacles | Spectacles, used for reading, in which the upper portion of the lenses are removed. Synonym: clerical spectacles, pantoscopic spectacles, pulpit spectacles. (05 Mar 2000) |
| half-glass spectacles | Spectacles, used for reading, in which the upper portion of the lenses are removed. Synonym: clerical spectacles, pantoscopic spectacles, pulpit spectacles. (05 Mar 2000) |
| safety spectacles | Spectacles which protect against ultraviolet or infrared rays or against mechanical injuries. Synonym: safety spectacles. (05 Mar 2000) |
| hemianopic spectacles | Spectacles with a prism or mirror to allow the individual with homonymous hemianopia to see objects in his blind half field. (05 Mar 2000) |
| protective spectacles | Spectacles which protect against ultraviolet or infrared rays or against mechanical injuries. Synonym: safety spectacles. (05 Mar 2000) |