| cortical blindness | Loss of sight due to an organic lesion in the visual cortex. (05 Mar 2000) |
|---|---|
| psychic 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) |
| sight blindness | A form of aphasia in which the significance of signs and symbols is not appreciated. Synonym: sight blindness. Synonym: asemasia, asaemia. Origin: G. A-priv. + symbolon, an outward sign (05 Mar 2000) |
| sign blindness | Visual agnosia for signs. (05 Mar 2000) |
| hysterical blindness | Loss of vision or blurring of vision following a highly traumatic event such as seeing one's child killed by a truck. (05 Mar 2000) |
| snow blindness | <ophthalmology> Severe photophobia that occurs secondary to ultraviolet light induced keratoconjunctivitis. (27 Sep 1997) |
| 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) |
| 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 |