[Etiology and clinical characteristics of acquired ptosis].

To evaluate the demographics, etiology composition, clinical characteristics and surgical outcomes of acquired ptosis patients. Retrospective case-series study. The clinical records of 176 consecutive patients (312 eyes) with acquired ptosis were reviewed from January 2009 to December 2018 in the Ophthalmology Department of Tianjin Medical University General Hospital. The demographics, etiology composition, clinical characteristics, surgical strategies and outcomes were analyzed. There were 59 male (33.5%) and 117 female (66.5%) patients suffering acquired ptosis, with an average age of (64±7) years. The disease was bilateral in 136 cases and unilateral in 40 cases. There were four etiological components of acquired ptosis: 145 cases (82.4%) of aponeurotic ptosis, 17 cases (9.6%) of neurogenic ptosis, 10 cases (5.7%) of myogenic ptosis and 4 cases (2.3%) of traumatic ptosis. The clinical characteristics of acquired ptosis varied significantly depending on etiology. Ptosis surgeries were performed on 152 cases (279 eyes), and the success rate was 92.1% (140/152). Surgical procedures included levator aponeurosis surgeries on 148 cases (275 eyes), frontal muscle suspensions on 2 cases (2 eyes) and conjunctival-Müller's ectomies on 2 cases (2 eyes). Acquired ptosis is more likely to occur in senile and female populations with bilateral eyelids involved mostly. Aponeurotic ptosis is the predominant type of acquired ptosis. The treatment is performed according to the clear etiological diagnosis based on clinical features, and operations are efficient for most patients with acquired ptosis. .