Amblyopia and Refractive Status in Congenital Ptosis: the Effect and Timing of Surgical Correction.

Purpose: The aim of this study was to explore the effect of congenital ptosis on the visual function of patients and observe the improvement in visual function after the correction of ptosis at different surgical times.Methods: We performed a retrospective study of 265 patients (346 eyes) with congenital ptosis at the same hospital. Each patient underwent an ophthalmic examination, including optometry and measurement of the affected palpebral fissure height and upper eyelid margin reflex distance. Preoperative clinical and morphologic data were compared with postoperative data.Results: The refractive error of the patient population was significantly different from that of the general population (P < 0.01). The rates of strabismus and amblyopia were 12.45% and 36.98%, respectively, in the ptosis patients, both of which are higher than the rates in the general population (P < 0.01), especially for unilaterally affected patients and patients with the optical axis covered. The refractive error of patients younger than 5 years was improved postoperatively (P < 0.05). The number of cases of amblyopia and strabismus was reduced, as was the percentage of cases of with-the-rule astigmatism (P < 0.05).Conclusion: Congenital ptosis can result in refractive error, strabismus, and amblyopia, which could seriously impair the visual function of patients. The impairment is more pronounced in unilaterally affected patients. Surgery is conducive to the recovery of visual function, especially in patients younger than 5 years. Satisfactory curative effects can be obtained before the age of 3 years; thus, unilaterally affected patients, severely affected patients, and patients with impaired visual function should undergo surgery as soon as possible.