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单词 microphthalmia
释义

Microphthalmia


Mi`croph`thal´mi`a


n.1.An unnatural smallness of the eyes, occurring as the result of disease or of imperfect development.

microphthalmia


microphthalmos

 [mi″krof-thal´mus] a developmental defect causing moderate or severe reduction in size of the eye.

mi·croph·thal·mos

(mī'krof-thal'mos), Abnormal smallness of the eye. Synonym(s): microphthalmia, nanophthalmia, nanophthalmos [micro + G. ophthalmos, eye]

microphthalmia

A congenital reduction in eye size, with the ocular bulb measuring 1/2 of the normal volume in extreme cases, due to an abnormal development of the optic vesicle in the optic cup.
Aetiology
• Congenital—e.g., encephalo-ophthalmic dysplasia, focal dermal hypoplasia, Hallermann-Streiff syndrome, incontinentia pigmenti, Lenz microphthalmia syndrome, retinopathy of prematurity, trisomy 13-15.
• Infectious—e.g., CMV, herpes, rubella, toxoplasmosis.
• Toxins—e.g., foetal alcohol syndrome.
Incidence
14/105; 3–11% of all cases of blindness.

microphthalmia

A congenital ↓ in eye size, with the ocular bulb measuring12 of the normal volume in extreme cases, due to an abnormal development of the optic vesicle in the optic cup, which may be 1. Congenital, as in encephalo-ophthalmic dysplasia, focal dermal hypoplasia, Hallermann-Streiff syndrome, incontinentia pigmenti, Lenz's microphthalmia syndrome, retinopathy of prematurity, trisomy 13-15 or.2. Infectious–eg, CMV, rubella, toxoplasmosis. See TORCH.

microphthalmia

Congenital anomaly in which the eyeball is abnormally small and often deeply set in a small orbit. It is typically hyperopic. Syn. microphthalmos; microphthalmus. When there is no other abnormality (e.g. coloboma of the iris, microphthalmos with cyst), the condition is called nanophthalmos (Fig. M10). See anophthalmia; monophthalmia; pseudoptosis.enlarge picture" >Fig. M10 Right eye microphthalmos (From Kanski 2007, with permission of Butterworth-Heinemann)enlarge pictureFig. M10 Right eye microphthalmos (From Kanski 2007, with permission of Butterworth-Heinemann)

mi·croph·thal·mos

, microphthalmia (mī'krof-thal'mŏs, -mē-ă) Abnormal smallness of the eye. [micro- + G. ophthalmos, eye]
ThesaurusSeenanophthalmos
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更新时间:2025/3/3 5:42:58