Unilateral pediatric ptosis: a practical technique for assessing levator function.

摘要

Levator function (LF) as estimated by maximal upper eyelid excursion between downgaze and upgaze (with frontalis splinting) is a critical aspect of upper eyelid ptosis evaluation. The surgical choice between brow suspension and levator resection/Whitnall sling for correcting ptosis depends on the measure of LF. Measurement error1 and patient cooperation are sources of significant error in the pediatric population. In addition, the lack of normative data on LF in children is problematic. We suggest digital photography and the levator function ratio (LFR) as potential solutions.