Characteristics of all pterygia lesions (n = 163)
| All pterygia (n = 163) | Grade I pterygia (transparent) (n = 89) | Grade II pterygia (intermediate) (n = 42) | Grade III pterygia (opaque) (n = 32) | p Value | |
|---|---|---|---|---|---|
| Width of base (mm) | |||||
| Mean (SD) | 3.3 (1.51) | 2.6 (1.29) | 3.7 (1.8) | 4.5 (1.5) | <0.001 |
| (range) | (0.1–9.5) | (0.1–6.0) | (1.0–6.0) | (1.5–9.5) | (for trend) |
| Extent from limbus (mm) | |||||
| Mean (SD) | 1.4 (1.18) | 1.0 (0.71) | 1.6 (0.9) | 2.3 (1.9) | <0.001) |
| (range) | (0.1–8.0) | (0.1–3.0) | (0.5–4.0) | (0.5–8.0) | (for trend) |
| No (%) | |||||
| Location | |||||
| Nasal | 152 (93) | 80 (90) | 42 (100) | 30 (94) | 0.1 |
| Temporal | 11 (7) | 9 (10) | 0 (0) | 2 (6) | |
| Affected eye | |||||
| Right | 82 (50) | 47 (53) | 19 (45) | 16 (50) | 0.72 |
| Left | 81 (50) | 42 (47) | 23 (55) | 16 (50) |