Table 2.
Comparison of preoperative and postoperative clinical parameters indicating glaucoma severity.
| Preoperative value | Postoperative value | p-value | |
|---|---|---|---|
| Best-corrected visual acuity (logMAR) | 0.2 ± 0.2 | 0.1 ± 0.2 | 0.625 |
| Intraocular pressure (mmHg) | 37.4 ± 10.8* | 14.8 ± 3.5† | <0.001 |
| Average RNFL thickness (µm) | 75.6 ± 17.7 | 70.2 ± 15.8 | <0.001 |
| Average GCIPL thickness (µm) | 68.0 ± 13.7 | 66.9 ± 12.7 | 0.145 |
| Mean deviation (dB) | −19.3 ± 9.6 | −18.7 ± 10.4 | 0.800 |
| Pattern standard deviation (dB) | 6.5 ± 3.1 | 6.8 ± 3.3 | 0.354 |
| Visual field index (%) | 54.3 ± 33.2 | 54.6 ± 34.1 | 0.813 |
logMAR = logarithm of the minimum angle of resolution, RNFL = retinal nerve fibre layer, GCIPL = ganglion cell layer plus inner plexiform layer.
Continuous variables are expressed as means ± standard deviation.
*Preoperative peak intraocular pressure (IOP) was the highest IOP among those measured between 1 month and 1 day before surgery.
†Postoperative mean IOP was calculated as the sum of all IOPs recorded during the postoperative period commencing 1 month postoperatively divided by the total number of examinations, up until the postoperative ophthalmic examination.