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Background Several factors affect the surgical success ofَAhmed Glaucoma Valve (AGV) implantation. Choroidal detachment (CD) remains a common complication after filtering surgeries. In the present study, we aimed to investigate the effect of choroidal detachment on the success of AGV. Methods In this case-control study, patients who underwent AGV implantation and developed CD were included as a case group. A control group matched for age, sex, systemic disease, lens status, baseline IOP, glaucoma type, and the number of previous glaucoma surgeries using coarsened exact matching were also included. The patients’ data, including intraocular pressure (IOP), number of glaucoma medications, and complications, were retrospectively extracted from the patients’ records. The primary outcome was the AGV success rate 5 < IOP < 18 and a 20-percent reduction from the baseline. IOP and Glaucoma medications were considered secondary outcomes. Results Seventeen patients were enrolled as a case group, and 38 matched individuals were included as controls. The average age of participants was 53.2 ± 16.2 years. Preoperative visual acuity of patients was 1.3 ± 0.8 logMAR. The patients in the case group showed higher IOP in all time intervals. However, the average IOP only reached a statistically significant difference at month 3 (17.94 ± 6.78 vs. 13.39 ± 3.09, P = 0.003). The mean survival duration was significantly shorter in patients with CD (10.4 ± 0.7 months vs. 11.7 ± 0.2 for controls LogRANK = 4.1, P = 0.04). In total patients, the cumulative probability of success was 98.2% and 89.1% in months 3 and 6. Conclusion Choroidal detachment after AGV implantation could be a risk factor for failure after 12 months. The patients experiencing CD in the postoperative period had significantly lower survival duration. A larger prospective with a longer follow-up duration is required to confirm the present study results.

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