To evaluate the benefits of one day, one eye ICL implantation which allows the ICL size of the later-operated eye to be adjusted after evaluating the postoperative vault of the first-operated eye in order to reduce the postoperative ICL size exchange rates of both eyes.

A total of 426 eyes of 213 patients who received one day, one eye bilateral ICL implantation were included in the present study. The cases where a different ICL size was implanted in the later-operated eye because of high or low postoperative vault of the first-operated eye were analyzed as well as the ICL exchange rates.

Among 213 patients, same size ICLs were implanted in both eyes in 188 patients (88%) as planned. However, a different ICL size was implanted in the later-operated eye in 25 patients (12%). Eight eyes of 8 patients out of 25 patients needed their ICL size exchanged during the follow-up period and all 8 eyes were first-operated eyes. This occurred in 8 patients (3.8%) out of 213 patients.

One day, one eye ICL implantation, which can help the size adjustment of the later-operated eye according to the postoperative 1 day vault of the first-operated eye, can reduce the risk of bilateral ICL size exchange operation.