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Case Reports
. 1990;6(4):265-8.
doi: 10.1097/00002341-199012000-00007.

Congenital ptosis in monozygotic twins

K P Vestal  1 , S R Seiff, J M Lahey
Affiliations
Case Reports

Congenital ptosis in monozygotic twins

K P Vestal et al. Ophthalmic Plast Reconstr Surg. 1990.

Abstract

A case of concordance for unilateral congenital ptosis in monozygotic twins is presented. The literature on genetics and congenital ptosis is reviewed. A heritability index is calculated for congenital ptosis, based on all current twin data including the present report. A value for the heritability index of 0.75 is found, suggesting a strong hereditary influence for congenital ptosis. We conclude that twin data strongly support a transmissable genetic defect as contributing to the development of congenital ptosis.

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