mi·croph·thal·mi·a (m  kr f-th l m - )n. Abnormal smallness of the eye. Also called microphthalmos, nanophthalmia, nanophthalmos. |
microphthalmia
see microphthalmos.
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.
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Fig. M10 Right eye microphthalmos (From Kanski 2007, with permission of Butterworth-Heinemann)
microphthalmia
A congenital ↓ in eye size, with the ocular bulb measuring1⁄2 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.
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