microphthalmia
(redirected from microphthalmus)Also found in: Dictionary, Encyclopedia.
Related to microphthalmus: microphthalmia
microphthalmos
[mi″krof-thal´mus]a developmental defect causing moderate or severe reduction in size of the eye.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
mi·croph·thal·mos
(mī'krof-thal'mos),Abnormal smallness of the eye.
[micro + G. ophthalmos, eye]
Farlex Partner Medical Dictionary © Farlex 2012
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.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
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 be1. 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.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
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.
)
Fig. M10 Right eye microphthalmos (From Kanski 2007, with permission of Butterworth-Heinemann)
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
mi·croph·thal·mos
, microphthalmia (mī'krof-thal'mŏs, -mē-ă)Abnormal smallness of the eye.
[micro- + G. ophthalmos, eye]
Medical Dictionary for the Dental Professions © Farlex 2012