Incidence and risk of ptosis following ocular surgery: a systematic review and meta-analysis
We conducted a systematic review and meta-analysis to evaluate the incidence and risk factors of ptosis following ocular surgery.
PubMed, Embase, and Cochrane Library were searched for articles that assessed the incidence or risk factors of ptosis following ocular surgery up to October 2017. We used a fixed effects model to calculate a pooled estimate of incidence, with subgroup analyses to evaluate the effect of different variables. The relative risks (RRs) or odds ratios (ORs) and 95% confidence intervals (CIs) for all available factors were calculated using the fixed effects models.
A total of 16 studies on 2856 eyes were analyzed, including 3 randomized controlled trials (RCTs) and 13 cohort studies. The overall incidence of ptosis following ocular surgery was 11.4% (95% CI 10.1–12.8%). Subgroup analyses showed that the region and the surgery type were significantly associated with the incidence of postoperative ptosis. Men were less likely to get postoperative ptosis than women (OR 0.62; 95% CI 0.43–0.89). However, age (OR 0.77; 95% CI 0.48–1.23), side (OR 1.37; 95% CI 0.84–2.25), type of anesthesia (OR 0.57; 95% CI 0.16–2.05), prior surgery (OR 1.09; 95% CI 0.64–1.83), bridle suture (OR 2.04; 95% CI 0.94–4.42), or combined surgery (OR 0.95; 95% CI 0.58–1.57) did not significantly change the risk of ptosis following ocular surgery.
More than one in ten patients who undergo ocular surgery will develop ptosis. Different regions and surgery types may influence the occurrence of this abnormality. Female gender is a risk factor for development of postoperative ptosis.
KeywordsOcular surgery Ptosis Incidence Risk factor Meta-analysis
This work was financially supported by Zhejiang Provincial Program for Medical and Health Science Co-sponsored by Province and Ministry (grant number 2016137996) and the National Key Research and Development Program of China (grant number 2016YFC1100403).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
For this type of study, formal consent is not required.
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