AIM: To study the influence of Ahmed glaucoma valve implantation on eyesight, intraocular pressure and corneal endothelial cell density of patients with traumatic angle recession glaucoma.

METHODS: Totally 33 cases(35 eyes)of patients with traumatic angle recession glaucoma admitted to our hospital since June 2014 to June 2016 were selected and treated with Ahmed glaucoma valve implantation. The clinical data of all patients were retrospectively analyzed, so as to evaluated to success rate of surgery. Non-contact tonometer was applied to surveying intraocular pressure before treatment and at 1wk, 1,3,6mo and 1a post treatment. Specular microscope was adopted to examine and calculate the corneal endothelial cell density before treatment and at 1wk, 1,3,6mo and 1a post treatment. All affected eyes were compared for visual acuity before surgery and in 1a after surgery, moreover, patients were followed-up, received the further consultations and the complications were recorded.

RESULTS: As for 35 affected eyes, the absolute success rate of surgery was 54%, while the relative success rate was 40%, and the total successful rate and failure rate were 94% and 6% respectively. In terms of the number of people who had no light sensation before surgery, or who had light sensation, ≤0.01, 0.01-0.10 or >0.10-0.20, there was no significant difference(Z=-0.132, P=0.362). The intraocular pressure before treatment was 43.43±3.65mmHg, at 1wk after surgery was 13.50±2.54mmHg, at 1mo was 15.93±2.61mmHg,at 6mo was 16.00±2.18mmHg and at 1a was 16.45±2.21mmHg, and the difference among different time points had statistical significance(F=887.82, P<0.01). After treatment the intraocular press decreased compared to before treatment(P<0.05); those after treatment had no difference with each other(P>0.05). Before treatment, the corneal endothelial cell density was 2443.35±343.12 pieces/mm², in 1wk after the surgery was 2231.67±334.45 pieces /mm², in 1mo after the surgery was 2065.47±336.45 pieces /mm², in 3mo after surgery was 2031.47±345.76 pieces/mm², in 6mo was 2001.72±337.18 pieces /mm² and in 1a after the surgery was 1979.65±301.32 pieces /mm², and the difference among different time points had statistical significance(F=13.49, P<0.01). After treatment the corneal endothelial cell density decreased compared to before treatment(P<0.05); those after treatment had no difference with each other(P>0.05). After surgery, there were 4 cases(4 eyes)of ocular hypotension, 3 cases(3 eyes)of hyphema, 2 cases(2 eyes)of drainage tube plugging and 2 cases(2 eyes)of intraocular hypertension, which were all quickly relieved after basic intervention treatment.

CONCLUSION: Treating traumatic angle recession glaucoma with Ahmed glaucoma valve implantation can dramatically optimize the state of intraocular hypertension and protect the retaining visual acuity, and visual acuity can be optimized in some cases. It causes little complication that can be relieved with basic prognosis, but postoperative corneal endothelial cell loss exists in some cases.