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| Total (%) | Cytoplasmic/ circumferential membrane | Apical | |
|---|---|---|---|
| Normal conjunctiva | |||
| Superficial | 0 | 0 | 0 |
| Wing | 100 | 7.3 | 92.7 |
| Basal | 100 | 3.0 | 97.0 |
| Pterygium head | |||
| Superficial | 25 | 0 | 25.0 |
| Suprabasal | 100 | 9.4 | 90.6 |
| Basal | 90 | 5.0 | 85.0 |
| Pterygium body | |||
| Superficial | 83.3 | 35.7 | 47.6 |
| Suprabasal | 100 | 62.5 | 37.5 |
| Basal | 100 | 65.5 | 34.5 |
| Pseudopterygium | |||
| Superficial | 16.7 | 8.4 | 8.3 |
| Suprabasal | 58.2 | 9.5 | 48.7 |
| Basal | 65.5 | 3.4 | 62.1 |
