| night myopia | In dark adaptation the eye becomes more sensitive to shorter wave lengths (Purkinje shift), and visual acuity depends on parafoveal blue cones. Shorter wavelengths come into focus in front of the retina, and this chromatic aberration accounts for some of the relative myopia that a normal eye experiences at night; much of the remainder is due to an increase in accommodative tone in the dark. Pathologic myopia, progressive myopia marked by fundus changes, posterior staphyloma, and subnormal corrected acuity. Synonym: degenerative myopia, malignant myopia. Prematurity myopia, myopia observed in infants of low birth weight or in association with retrolental fibroplasia. (05 Mar 2000) |
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| night pain | Denoting especially the osteocopic pains of syphilis occurring at night. Synonym: night pain. Origin: nyct-+ G. Algos, pain (05 Mar 2000) |
| night sight | <ophthalmology> Day blindness, defective vision in a bright light. Origin: Gr. Hemera = day, alaos = blind (18 Nov 1997) |
| night sweats | Profuse sweating at night, occurring in pulmonary tuberculosis and other chronic debilitating affections with low-grade fever. (05 Mar 2000) |
| night-terrors | A disorder allied to nightmare, occurring in children, in which the child awakes screaming with fright, the distress persisting for a time during a state of saemiconsciousness. Synonym: pavor nocturnus, sleep terror. (05 Mar 2000) |
| night vision | Vision when the eye is dark-adapted. See: dark adaptation, dark-adapted eye. Synonym: night vision, rod vision, scotopia, twilight vision. (05 Mar 2000) |
| acne | <dermatology> An inflammatory disease of the pilosebaceous unit, the specific type usually being indicated by a modifying term, frequently used alone to designate common acne or acne vulgaris. Origin: possibly Gr. Akm = a point or achn = chaff (15 Nov 1997) |
| acne albida | Acne caused by milia. (05 Mar 2000) |
| acne artificialis | Acne produced by external irritants, such as tar (chloracne), or drugs internally administered, such as iodides or bromides. Synonym: acne venenata. (05 Mar 2000) |
| acne bacillus | A bacteria isolated from normal skin, intestinal contents, wounds, blood, pus, and soft tissue abscesses. It is a common contaminant of clinical specimens, presumably from the skin of patients or attendants. (12 Dec 1998) |
| acne cachecticorum | Acne occurring in persons who have a debilitating constitutional disease; characterised by large, soft, purulent, ulcerative, cystic, and scarred lesions. (05 Mar 2000) |
| acne ciliaris | Follicular papules and pustules on the free edges of the eyelids. (05 Mar 2000) |
| acne conglobata | Severe cystic acne, characterised by cystic lesion, abscesses, communicating sinuses, and thickened, nodular scars; usually sparing the face. (05 Mar 2000) |
| acne cosmetica | Low-grade, non-inflammatory acne lesions from repeated application of comedogenic agents in cosmetics. (05 Mar 2000) |
| acne decalvans | A papular or pustular inflammation of the hair follicles of the scalp seen mostly in men, resulting in scarring and loss of hair in the affected area. Synonym: acne decalvans, alopecia follicularis. (05 Mar 2000) |