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.