Gonioscopy-assisted transluminal trabeculotomy (GATT) with scleral or iris fixation for subluxated intraocular lenses and glaucoma.

INTRODUCTION

This retrospective chart review aims to report a combined surgical approach of intraocular lens (IOL) fixation and gonioscopy-assisted transluminal trabeculotomy (GATT) for the treatment of subluxated IOLs and glaucoma or ocular hypertension.

METHODS

Charts of patients who underwent IOL fixation combined with GATT between November 2019 and July 2023 were reviewed. The main outcome measure was surgical success, defined as a well-centered IOL and an IOP of 18 mmHg or lower and either a 30% IOP reduction or a reduction in medications as compared to baseline. Complications and the need for reoperation were recorded.

RESULTS

Eleven patients who underwent GATT with IOL fixation were included. The mean age was 80.45 years (range: 73-90). IOL subluxation was associated with pseudoexfoliation in all cases. Seven patients underwent scleral fixation, and four underwent iris fixation. The mean follow-up was 15.36 (range: 2.7-26.6) months. The success rate was 72.73%. The mean baseline IOP was 20.63 ± 6.56 mmHg on 2.81 ± 1.53 medications. Four patients were on oral carbonic-anhydrase inhibitor (CAI) before surgery. The mean IOP at the end of the follow-up was 13.86 ± 3.5 mmHg on 1.36 ± 1.57 medications, and none were on oral CAIs. No intraoperative complications occurred, and transient hyphema and vitreous hemorrhage were the most common postoperative complications. All patients had a well-centered IOL. No patients needed additional surgery for IOL position or IOP control. The mean corrected distance visual acuity was 0.634 ± 0.62 logMAR at baseline and 0.36 ± 0.38 at the end of follow-up.

CONCLUSIONS

GATT can be combined with IOL fixation to the sclera or iris to effectively reduce IOP and medication usage.