Table 1. Demographic characteristics and clinical findings of patients with pterygium and healthy controls.
| Condition | Pterygium | Healthy control | t | P a |
| Age (y) | 45±11 | 46±13 | -0.16 | 0.92 |
| Sex (M/F) | 0/18 | 0/18 | N/A | >0.99 |
| Best corrected visual acuity | 0.6±0.5 | 1±1 | 0.35 | 0.04 |
| SE-L (D) | 1.15±1.00 | 1.25±0.75 | 0.19 | 0.83 |
| Astigmatism-L (D) | 2.50±0.75 | 1.25±0.75 | 4.17 | 0.04 |
| SSI | 9±1 | 9±1 | N/A | >0.99 |
| Course of pterygium (y) | 6.70±5.01 | / | / | / |
| Length of pterygium (mm) | 6.25±1.65 | / | / | / |
| Height of pterygium (mm) | 4.01±1.44 | / | / | / |
| Area of pterygium (mm2) | 21.69±11.33 | / | / | / |
| Heart rate (beats/min) | 69±6 | 68±7 | -0.12 | 0.95 |
| Systolic blood pressure (mm Hg) | 128±15 | 127±18 | -0.21 | 0.85 |
| Diastolic blood pressure (mm Hg) | 86±13 | 85±12 | -0.06 | 0.79 |
| Mean intraocular pressure (mm Hg) | 18±3 | 15±5 | -0.25 | 0.72 |
aIndependent t-tests comparing two groups. N/A: Not applicable; L: Left; SE: Spherical equivalent; SSI: Signal strength index.