Table 1 Demographic and preoperative ocular characteristics

Age at time of surgery (years)

68.6 ± 8.8

Sex (male:female), n (%)

29:33 (46.8:53.2)

Eye (OD:OS); n (%)

33:29 (53.2:46.8)

History of selective laser trabeculoplasty, n (%)

28 (45.2)

Central corneal thickness (μm)

545.7 ± 34.5

Axial length (mm)

24.0 ± 1.6

Anterior chamber depth (mm)

3.1 ± 0.4

Intraocular pressure (mmHg)

19.2 ± 3.9

Glaucoma medications

2.8 ± 1.1

Best-corrected visual acuity (logMAR)

0.17 ± 0.15

Cup-to-disc ratio

0.71 ± 0.16

Visual field mean deviation (dB)

 − 5.9 ± 6.6

Retinal nerve fiber layer thickness (μm)

70.5 ± 13.7

Ganglion cell-inner plexiform layer thickness (μm)

64.4 ± 12.9