Congenital or developmental anomaly in which the eyeballs are abnormally small. ... (12 Dec 1998) ... 
(mi″krof-thal´mos) a developmental defect causing moderate or severe reduction in size of the eye.
Type: Term Pronunciation: mī′krof-thal′mos Definitions: 1. Abnormal smallness of the eye. Synonyms: microphthalmia, nanophthalmia, nanophthalmos
A small eye that has failed to develop properly.