Comparison of the Changes in Corneal Endothelial Cells after Pars Plana and Anterior Chamber Ahmed Valve Implant
Table 2
Preoperative and postoperative 18-month values in the ppAGV and acAGV groups.
ppAGV ()
acAGV ()
P value
ECC, cells/mm2
Preoperative
2337 ± 311
2334 ± 302
0.98
Postoperative
2044 ± 303
1904 ± 324
0.25
P value
<0.001
<0.001
BCVA, LogMAR
Preoperative
1.76 ± 0.91
2.10 ± 0.93
0.31
Postoperative
1.27 ± 0.97
1.64 ± 1.18
0.21
P value
0.070
0.063
IOP, mmHg
Preoperative
35.9 ± 7.6
39.7 ± 12.7
0.26
Postoperative
16.5 ± 7.5
17.1 ± 8.6
0.87
P value
<0.001
<0.001
Glaucoma medication
Preoperative
2.9 ± 0.3
2.7 ± 0.6
0.39
Postoperative
1.5 ± 0.8
1.6 ± 0.8
0.52
P value
<0.001
<0.001
Surgical outcome (%)
Success
16 88.8
14 77.8
0.66
Failure
2 11.2
4 22.2
ppAGV: pars plana implantation of an Ahmed glaucoma valve (AGV), acAGV: anterior chamber implantation of an AGV, ECC: endothelial cell count, BCVA: best corrected visual acuity, LogMAR: logarithm of the minimal angle of resolution, and IOP: intraocular pressure.
