Outcomes of 39 Canine Eyes Treated With Combined Endoscopic Cyclophotocoagulation and Ahmed Valve Gonioimplantation for Glaucoma.

PURPOSE: To evaluate the long-term (> 1 year) outcomes of vision and intraocular pressure (IOP) control in dogs with glaucoma undergoing combined endoscopic cyclophotocoagulation (ECP) and Ahmed valve gonioimplantation (AVG).

METHODS

Medical records between 2020 and 2025 were reviewed. Outcomes evaluated included IOP control (< 25 mmHg), vision preservation, number of medications, and complications. A successful outcome was defined as intact menace response and controlled IOP < 25 mmHg.

RESULTS

Median (range) follow-up time for 39 eyes (32 dogs) was 26 (12-65) months. Among eyes with documented vision status at each postoperative time point, vision was preserved in 72.0% (18/25) at 12 months, 72.2% (13/18) at 18 months, 75% (12/16) at 24 months, 57.1% (4/7) at 30 months, and 69.2% (9/13) at 36 months. Among eyes with IOP recorded at each postoperative time point, IOP was controlled in 96.9% (31/32) at 12 months, 95.7% (22/23) at 18 months, and 100% at 24 months (19/19), 30 months (11/11), and 36 months (9/9). These outcomes were achieved with antiglaucoma medications administered when clinically indicated; however, medication burden decreased from a median of 3 preoperatively to 1 at 36 months postoperatively. Common complications included IOP spikes (n = 18/39 eyes, 46.2%), intraocular fibrin (n = 9/39 eyes, 23.1%), corneal ulceration (n = 9/39 eyes, 23.1%), uveitis (n = 8/39 eyes, 20.5%), and corneal edema (n = 7/39 eyes, 17.9%).

CONCLUSIONS

The combined ECP/AVG approach was successful in maintaining vision and controlling IOP for more than 1 year in the patients included. Outcomes were similar between glaucoma types, while preoperative vision status was significantly associated with postoperative visual outcome.