nanophthalmos
Pronunciation: nan-of-THAL-mohs
Rare bilateral condition of extremely small but structurally normal eyes, predisposing to angle-closure glaucoma.
Full Definition
Nanophthalmos is a rare congenital condition characterized by unusually small eyes that maintain normal structural proportions but have shortened axial length, typically less than 20mm. Unlike microphthalmos, the eye structure is anatomically normal but miniaturized. Patients are at high risk for uveal effusion syndrome and angle-closure glaucoma due to the crowded anterior segment. Surgical management requires specialized techniques due to the thick sclera and increased risk of complications during intraocular procedures.
Usage
Usage note: Distinguish from microphthalmos by emphasizing normal structural proportions in nanophthalmos.
In Context
- "The patient's nanophthalmos required prophylactic iridectomy to prevent angle closure." — Glaucoma surgical planning
- "Cataract surgery in nanophthalmos was complicated by uveal effusion despite prophylactic sclerotomies." — Surgical complication report