LAUSR

PRéCIS:: The present study demonstrates that surgical success rates of gonioscopy-assisted transluminal trabeculotomy with a target IOP ≤21▒mmHg are 93.3% (for qualified success) and 26.7% (for complete success) in vitrectomized patients exhibiting secondary open-angle glaucoma after silicone oil removal, for an average follow-up of 37.5 months. PURPOSE To report the long-term outcomes of gonioscopy-assisted transluminal trabeculotomy (GATT) in vitrectomized patients exhibiting secondary open-angle glaucoma (SOAG) after silicone oil removal. SETTING Retrospective case-series study. PATIENT POPULATION This retrospective case-series study enrolled vitrectomized patients who underwent uneventful GATT surgery between May 2014 and May 2019 at Gazi University Hospital for the treatment of medically uncontrolled SOAG after silicone oil removal. MAIN OUTCOME MEASURES At baseline and at each postoperative visit, a detailed ophthalmic examination consisting of slit-lamp biomicroscopy, indirect ophthalmoscopy, macular optical coherence tomography, and Goldmann applanation tonometry was performed in all patients. Baseline demographic and clinical characteristics, duration between pars plana vitrectomy (PPV) and silicone oil removal, duration between silicone oil removal and onset of SOAG, follow-up time, need for anti-glaucoma medication, visual acuity, and intraocular pressure (IOP) measurements were noted. Surgical success was defined as an IOP≤21▒mmHg and ≥6▒mmHg with (qualified success) and without (complete success) IOP-lowering medication. RESULTS A total of 15 patients had a history of PPV with 1000-centistoke silicone oil tamponade before the GATT surgery. GATT was performed in all patients with SOAG after silicone oil removal. The mean age and follow-up of the patients were 53.6±11.8 (range, 34-72) years and 37.5±15.1 (range, 12-61) months, respectively. The average duration of silicone oil tamponade in the vitreous cavity was 7.5±1.6 (range, 5-10) months. The average duration between the silicone oil removal and the development of SOAG was 14.1±13.2 (range, 2-46) months. The mean IOP decreased from 31.0±4.1▒mmHg at baseline to 15.6±4.6▒mmHg at final visit. The mean final logMAR BCVA was 0.92±0.58 (range, 2-0.045). Qualified surgical success was achieved in 14 (93.3%) patients, while complete success was achieved in only four (26.7%) patients (P<0.001). CONCLUSIONS GATT seems to be safe and successful procedure for controlling IOP in patients exhibiting SOAG after silicone oil removal. However, most patients may require anti-glaucoma medication during the follow-up, particularly within the first two postoperative years.