Table 3.

Reasons for Failure After Ahmed Glaucoma Valve with Subsequent Cyclophotocoagulation, as Needed

Reason for Failure	N
Incisional glaucoma surgery	7	6.5%
AGV removal	4	4%
Loss of light perception	4	4%
IOP >21 mmHg or < 20% reduction from baseline*	14	13%
IOP ≤ 5 mmHg **	6	6%

Notes: *Of the 14 eyes that failed due to inadequate IOP lowering, 9 (64%) had no further intervention, and 5 (36%) had CPC. **Of the 6 eyes that failed due to hypotony, 3 underwent surgical revision, 1 had low IOP due to traumatic retinal detachment, and 2 eyes of the same patient had numerical hypotony not requiring treatment.