Table 1 Clinical classification of pterygium
From: Low recurrence rate of anchored conjunctival rotation flap technique in pterygium surgery
Stage (S) | ||
1 | corneal invasion less than 1 mm | |
2 | corneal invasion 1–2 mm | |
3 | corneal invasion 2–3 mm | |
4 | corneal invasion more than 3 mm | |
Vascularity (V) | ||
1 | minimal visible vessel equal to conjunctiva | |
2 | moderate vascularity more dense than conjunctiva | |
3 | severe vascularity with vessel congestion | |
Conjunctival tissue thickness (C) | ||
1 | flat tissue | |
2 | minimally elevated tissue | |
3 | tissue elevation up to 1 mm | |
4 | tissue elevation over 1 mm | |
Corneal tissue thickness (K) | ||
1 | flat tissue | |
2 | minimally elevated tissue | |
3 | tissue elevation up to 1 mm | |
4 | tissue elevation over 1 mm | |