Posterior chamber phakic implantable collamer lens: changes in vault during 1 year.

PURPOSE

To evaluate the changes in vault over time after Implantable Collamer Lens (ICL; STAAR Surgical) posterior chamber phakic intraocular lens implantation.

METHODS

A total of 36 eyes of 19 patients who underwent ICL implantation were enrolled in the study. Vault (the distance between the back surface of the ICL and the front surface of the crystalline lens) was measured postoperatively using anterior optical coherence tomography. Patients were divided into three groups based on vault (low < or =0.25 mm, moderate >0.25 to <0.75 mm, or high > or =0.75 mm).

RESULTS

Mean vault at 1 year postoperative was 0.53+/-0.25 mm. The percentages of eyes in the low, moderate, and high vault groups were 13.9%, 72.2%, and 13.9%, respectively. A significant decrease in vault was noted up to 1 month, after which the value stabilized (P<.0001). High vault showed a gradual decrease up to 3 months (P<.0001), after which the value stabilized. A statistically significant correlation was present between the change noted for vault values during the 1-year follow-up period and those measured for the initial vault on postoperative day 1 (P<.0001, r(2)=0.6393).

CONCLUSIONS

Although values for low and moderate vault exhibited little change after ICL implantation, high vault tended to decrease over time and became stable at 3 months after surgery.