Abstract
Abstract: :
Purpose:To evaluate the stability after implantaion of a collagen polymer Implantable Contact Lens (ICL, Staar Surgical) Methods:A Staar Collamer posterior chamber phakic IOL was implanted in 177 eyes. The ICL was implanted horizontally through temporal corneal incision. One and 3 months postoperatively, the ICL axis was subjectively measured using 2 dimples on ICL by slit lamp biomicroscopy after pupil dilatation. Results:The mean age of the patients was 30.5 ± 7.9 years (range, 21 ∼ 49 years). And the mean preoperative spherical equivalent was –12.27 ± 4.33 diopters (range, –28.75 ∼ –2.75 diopters). Most patients (170 eyes, 96%) did not show prominent axis change between postoperative 1 month and 3 months. But 7 eyes (4%) showed axis change of over 30 degrees. For these 7 eyes additional regular dilated examination was done. In these 7 rotation cases the degree of rotation was changing overtime except 1 eye. Repositioning of ICL was done in one vertically rotated ICL case with decentration, in which case the rotation recurred. Two eyes including one reposition case had ICL exchange due to accompanying halo. Of the remaining 5 eyes, two eyes had ICL rotation of about 45 degrees and three eyes had vertical ICL rotation without halo. These 5 eyes had no additional treatment. These 5 rotation cases had symmetric and low to adequate vault without decentration. Conclusion:ICL rotation can occur after ICL implantation surgery. If this happens in spherical ICL, the exchange surgery is not needed frequently, but in toric ICL, the exchange surgery or ICL removal would be almost mandatory. When exchanging rotated spherical or toric ICL, the exact measurement of the longest sulcus to sulcus diameter will help the accuracy of exchange surgery.
Keywords: refractive surgery: phakic IOL • refractive surgery: complications • visual acuity