Comparison of the Changes in Corneal Endothelial Cells after Pars Plana and Anterior Chamber Ahmed Valve Implant

Table 3

Comparison of endothelial cell loss at postoperative 18 months between ppAGV and acAGV groups.

	Preoperative ECC, cells/mm^2	Decreased ECC, cells/mm^2	% of loss
Total (range)	2336 ± 302; (1805–2854)	361 ± 135; (135–762)	15.5
ppAGV (range)	2337 ± 311; (1805–2842)	292 ± 120; (135–571)	12.5
acAGV (range)	2334 ± 302; (1879–2854)	430 ± 140; (158–762)	18.4
P value; (ppAGV versus acAGV)	0.98	0.05	NA

ppAGV: pars plana implantation of an Ahmed glaucoma valve (AGV), acAGV: anterior chamber implantation of an AGV, ECC: endothelial cell count, and NA: not applicable.