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Quantification of palpebral fissure shape in severe congenital blepharoptosis
1Department of Ophthalmology, School of Medicine of Ribeirão Preto, University of São Paulo, Brazil.
Purpose:
To measure palpebral fissure morphology in patients with severe congenital blepharoptosis.
Methods:
The palpebral fissure shape of 20 patients (30 eyes) with severe congenital blepharoptosis (levator excursion < or = 4 mm) was quantified with digital image processing in a cross-sectional design. Several variables related to the morphology of the palpebral fissure were measured: (a) upper and lower eyelid curvature, (b) palpebral fissure angle, and (c) position of the upper maximum and lower minimum eyelid contour.
Results:
Patients with severe congenital blepharoptosis often show a moderate degree of antimongoloid palpebral fissure orientation and eyelid drooping that is greater temporally than nasally.
Conclusions:
Contour adjustment in severe congenital blepharoptosis surgery is better when it is not centered on the midline, but rather has a slight lateral displacement.