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1. Microcornea

CONGENITAL CORNEAL ANOMALIES. 1. Microcornea. 2. Megalocornea. 3. Sclerocornea. 4. Cornea plana. 5. Keratectasia. Microcornea. Very rare, hereditary, unilateral or bilateral Corneal diameter is 10 mm or less Shallow anterior chamber but other dimensions are normal.

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1. Microcornea

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  1. CONGENITAL CORNEAL ANOMALIES 1. Microcornea 2. Megalocornea 3. Sclerocornea 4. Cornea plana 5. Keratectasia

  2. Microcornea • Very rare, hereditary, unilateral or bilateral • Corneal diameter is 10 mm or less • Shallow anterior chamber but other dimensions are normal Ocular associations Glaucoma, cataract, cornea plana, leukoma and iris abnormalities Associated systemic syndromes Turner, Ehlers-Danlos, Weill-Marchesani and Waardenburg

  3. Megalocornea • Very rare, hereditary, • bilateral • Corneal diameter 13 mm • or more • Very deep anterior • chamber • High myopia and • astigmatism • Occasionally lens • subluxation Systemic associations • Marfan, Apert, • Ehlers-Danlos and • Down syndromes • Osteogenesis imperfecta • Renal carcinoma and • mental handicap

  4. Sclerocornea • Very rare, usually bilateral • Peripheral opacification and vascularization of cornea • ‘Scleralization’ makes cornea appear smaller

  5. Cornea plana • Very rare, bilateral severe decrease in corneal curvature • Hypermetropia and shallow anterior chamber Ocular associations Glaucoma, microcornea, microphthalmos and Peters anomaly

  6. Keratectasia • Very rare, usually unilateral • Severe corneal opacification and protruberance • Probably caused by intrauterine keratitis

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