| solar blindness | Damage to the fovea centralis of the retina and the adjacent choroid due to the thermal action of infrared rays, consequent to sungazing or watching a solar eclipse without sufficient eye protection. See: photoretinopathy. Synonym: eclipse blindness, solar blindness. (05 Mar 2000) |
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| night blindness | Failure or imperfection of vision at night or in dim light, with good vision only on bright days. (12 Dec 1998) |
| note blindness | Loss of the ability to read music. (27 Sep 1997) |
| day blindness | <ophthalmology> Day blindness, defective vision in a bright light. Origin: Gr. Hemera = day, alaos = blind (18 Nov 1997) |
| object blindness | Visual agnosia for objects. The subjet sees the object, but cannot identify it; due to a lesion in area 18 of the occipital cortex. Synonym: object blindness, psychanopsia, psychic blindness. (05 Mar 2000) |
| taste blindness | Inability to appreciate gustatory stimuli. (05 Mar 2000) |
| text blindness | Loss of the ability to understand printed words or sentences (27 Sep 1997) |
| eclipse blindness | Damage to the fovea centralis of the retina and the adjacent choroid due to the thermal action of infrared rays, consequent to sungazing or watching a solar eclipse without sufficient eye protection. See: photoretinopathy. Synonym: eclipse blindness, solar blindness. (05 Mar 2000) |
| flash blindness | A temporary loss of vision produced when retinal light-sensitive pigments are bleached by light more intense than that to which the retina is physiologically adapted at that moment. (05 Mar 2000) |
| flight blindness | Visual blackout in aviators. See: amaurosis fugax. (05 Mar 2000) |
| legal blindness | Generally, visual acuity of less than 6/60 or 20/200 using Snellen test types, or visual field restriction to 20 |
| functional blindness | Apparent loss of vision related to suggestibility. (05 Mar 2000) |
| letter blindness | Visual agnosia for letters. The subject sees the letters but cannot identify them; caused by a lesion in the occipital cortex. (05 Mar 2000) |
| acridine yellow | A faintly yellow solution with strong bluish-violet fluorescence; used as a topical antiseptic and as a fluorescent stain in histology. Synonym: 5-aminoacridine hydrochloride, 9-aminoacridine hydrochloride. (05 Mar 2000) |
| acute yellow atrophy of the liver | A lesion in which there is extensive and rapid death of parenchymal cells of the liver, sometimes with fatty degeneration of the size of the organ; the necrosis may result from fulminant viral infection or chemical poisoning; associated with jaundice. Synonym: acute parenchymatous hepatitis, Rokitansky's disease. (05 Mar 2000) |