| No of patients (eyes) | 41 subjects (each group; 41 eyes) | – |
| Age (years) | 60.1 (11.5) | – |
| Female gender, n (%) | 18 (44%) | – |
| Diabetes type 2, n (%) | 40 (98%) | – |
| Duration of diabetes (years) | 16.0 (5.2) | – |
| Haemoglobin A1c (%) | 8.2 (2.1) | – |
| Hypertension, n (%) | 20 (49%) | – |
| Hyperlipidaemia, n (%) | 21 (51%) | – |
| Severe non-proliferative diabetic retinopathy/proliferative diabetic retinopathy, n (%) | 29 (71%)/12 (29%) | 29 (71%)/12 (29%) | – |
| Clinically significant macular oedema, n (%) | 17 (41%) | 17 (41%) | – |
| Intraocular pressure (mm Hg) | 15.7 (3.1) | 15.8 (3.1) | 0.89 |
| LogMAR best-corrected visual acuity | 0.13 (0.33) | 0.14 (0.33) | 0.90 |
| Foveal thickness (μm) | 269.0 (114.9) | 290.2 (135.7) | 0.45 |
| Parafoveal thickness (μm) | 317.6 (76.4) | 331.7 (101.1) | 0.49 |
| Perifoveal thickness (μm) | 292.4 (59.4) | 297.2 (78.3) | 0.76 |