Search strategy
A systematic search was performed in PubMed, Science Direct, EMBASE and
Cochran Library. One or a
combination of the following terms was used in the search:
congenital,
infant, child, pediatric, cataract, intraocular lens, IOL, primary,
secondary, pseudophakia, aphakia, cataract surgery, comparison and
compare. The publication time was
restricted from January 1, 2000 to August 2, 2020. Two investigators
(Shanshan Jin and Jingshang Zhang) searched and screened the articles
independently. In case of disagreement about the literature search, a
third reviewer (Xiuhua Wan) would engage in the discussion until a
consensus was reached. Figure 1 showed the selection process.