Randomization
SECONDARY, LENS, IOL
Stratified block randomization will be applied for this trial. The eligible participants stratified by site who consented will then be divided into two strata according to secondary intraocular lens implantation in the unilateral eyes or bilateral eyes. Participants in each stratum will be randomized (1:1) to receive the assigned treatment from either secondary in-the-bag IOL implantation or secondary sulcus IOL implantation. An independent statistician without involvement in the study will generate the randomization sequence for each stratum using an online randomization number generator (Study participants with one study eye will be randomly assigned to one of the treatment groups.Study participants with two study eyes (both eyes are eligible):If capsular surgery is applicable for both eyes, study participants will be randomly assigned to one of the treatment groups, and both eyes will receive the same treatment.If capsular surgery is applicable for only one eye, which will be randomly assigned to one of the treatment groups, the contralateral eye will receive sulcus surgery or other appropriate treatment.