| 释义 |
xerophthalmiaenUK
xer·oph·thal·mi·a X0005500 (zîr′əf-thăl′mē-ə)n. Extreme dryness and thickening of the conjunctiva, often resulting from a deficiency of vitamin A.
xer′oph·thal′mic adj.xerophthalmia (ˌzɪərɒfˈθælmɪə) n (Pathology) pathol excessive dryness of the cornea and conjunctiva, caused by a deficiency of vitamin A. Also called: xeroma ˌxerophˈthalmic adjxe•roph•thal•mi•a (ˌzɪər ɒfˈθæl mi ə, -ɒp-)
n. abnormal dryness of the eye caused by a deficiency of tears. [1650–60; xer- + ophthalmia] xe`roph•thal′mic, adj. xerophthalmia, xerophthalmya form of conjunctivitis, the result of a deficiency of vitamin A, marked by a dry and dull condition of the eyeball. Also called xeroma.See also: EyesThesaurus| Noun | 1. | xerophthalmia - abnormal dryness of the conjunctiva and cornea of the eyes; may be due to a systemic deficiency of vitamin Aconjunctivitis arida, xeroma, xerophthalmusdryness, waterlessness, xerotes - the condition of not containing or being covered by a liquid (especially water) |
TranslationsXerophthalmiaenUK
xerophthalmia[‚zi‚räf′thal·mē·ə] (medicine) Dryness and thickening of the conjunctiva, sometimes following chronic conjunctivitis, disease of the lacrimal apparatus, or vitamin A deficiency. Xerophthalmia an affection of the eyes expressed in dryness of the conjunctiva and cornea. It arises as a result of disturbance of tear secretion and chiefly of trophic disturbances. One of the immediate causes of xerophthalmia is avitaminosis A; it may arise in children when there are severe gastrointestinal diseases. The most frequent causes of xerophthalmia are trachoma, pemphigus, and chemical burns of the eyes. It is manifested by a sensation of dryness and pain in the eyes and heaviness of the eyelids; the cornea becomes cloudy and may undergo irreversible cicatricial changes. Vision is decreased. Xerophthalmia is treated by medication; good results are obtained by transplanting the excretory duct of the parotid gland to the conjunctival sac to restore moisture to the eye. xerophthalmiaenUK
xe·roph·thal·mi·a (zē'rof-thal'mē-ă), Excessive dryness of the conjunctiva and cornea, which lose their luster and become keratinized; may result from local disease or due to a systemic deficiency of vitamin A. Synonym(s): conjunctivitis arida, xeroma, xerophthalmus [xero- + G. ophthalmos, eye] xerophthalmia (zîr′əf-thăl′mē-ə)n. Extreme dryness and thickening of the conjunctiva, often resulting from a deficiency of vitamin A.
xer′oph·thal′mic adj.Dryness of eyes, often due to decreased tear secretion, which occurs in Sjögren syndrome, autoimmune disorders—systemic lupus, rheumatoid arthritis, scleroderma, sarcoidosis—amyloidosis, hypothyroidism, vitamin A deficiency, and in periorbital lymphoproliferative disordersxerophthalmia Dry eye syndrome, see there. xe·roph·thal·mi·a (zēr'of-thal'mē-ă) Excessive dryness of the conjunctiva and cornea, which lose their luster and become keratinized; may be due to local disease or to a systemic deficiency of vitamin A.
Synonym(s): xeroma. [xero- + G. ophthalmos, eye]xerophthalmia Dryness of the eyes with thickening of the CONJUNCTIVA, occurring in vitamin A deficiency, PEMPHIGUS and autoimmune disorders such as SJOGREN'S SYNDROME. Artificial tears must be used constantly to maintain the essential film of water over the cornea.XerophthalmiaXerophthalmia is a dry, thickened, lusterless condition of the eyeball resulting from vitamin A deficiency.Mentioned in: Visual Impairment, Vitamin A Deficiencyxerophthalmia Extreme dryness of the conjunctiva and cornea due to a failure of the secretory activity of the mucin-secreting goblet cells of the conjunctiva. The conjunctiva and cornea lose their lustre and become skin-like in appearance. The condition may even propagate to the cornea and give rise to keratoconjunctivitis sicca and, if severe, keratomalacia. Xerophthalmia may be due to trauma, exposure or systemic deficiency of vitamin A, etc. Syn. xeroma; xerosis of the conjunctiva (if the cornea is not involved). See keratoconjunctivitis sicca; keratomalacia; mucin; Bitot's spot.xe·roph·thal·mi·a (zēr'of-thal'mē-ă) Excessive dryness of the conjunctiva and cornea, which lose their luster and become keratinized; may be due to local disease or to a systemic deficiency of vitamin A.
Synonym(s): xeroma. [xero- + G. ophthalmos, eye]xerophthalmiaenUK
Related to xerophthalmia: InfasurfSynonyms for xerophthalmianoun abnormal dryness of the conjunctiva and cornea of the eyesSynonyms- conjunctivitis arida
- xeroma
- xerophthalmus
Related Words- dryness
- waterlessness
- xerotes
|