Preoperative patient demographics
| Abexterno TLO (n=50) | Abinterno TLO (n=50) | P value | |
| Mean age (SD) | 66.0 (16.9) | 66.6 (15.7) | 0.98* |
| Right eye (%) | 22(44) | 18(36) | 0.54† |
| Men (%) | 25(50) | 26(52) | 1.00† |
| Combined cataract surgery (%) | 10(20) | 12(24) | 0.81† |
| Preoperative HVF MD (SD), dB | −11.0 (7.8) | −13.6 (8.6) | 0.14* |
| Preoperative IOP (SD), mm Hg | 32.5 (11.2) | 28.4 (7.8) | 0.08* |
| Preoperative glaucoma drug score (SD) | 4.3 (1.4) | 4.9 (1.1) | 0.02* |
| Phakia(%) | 23(46) | 17(34) | 0.77* |
| Preoperative logMAR visual acuity | 0.19 (0.52) | 0.04 (0.22) | <0.01* |
| Preoperative corneal endothelial cell density (SD), cells/mm2 | 2600.5 (346.9) | 2391.9 (592.2) | 0.09* |
| Glaucoma type | |||
| Primary open angle glaucoma (%) | 15(30) | 22(44) | 0.21† |
| Exfoliation glaucoma (%) | 17(34) | 17(34) | |
| Steroid-induced glaucoma (%) | 9 (18) | 4 (8) | |
| Other secondary glaucoma (%) | 9 (18) | 7 (14) |
*Mann-Whitney U test.
†Fisher’s exact test.
ab externo TLO, trabeculotomy ab externo; ab interno TLO, trabeculotomy ab interno using a microhook; HVF, Humphrey visual field; IOP, intraocular pressure; logMAR, logarithm of minimal angle resolution; MD, mean deviation.