Table 2 Nomogram proposed by Nordan for the treatment of astigmatism
From: Radial keratotomy: background and how to manage these patients nowadays
ASTIGMATISM (D) | OPTICAL ZONE | ARC LENGTH (MM) | NO INCISION | NO RADIAL INCISION |
|---|---|---|---|---|
1.00—1.50 | 7.0 | 4.5 | 1 | 1 |
1.75—2.25 | 7.0 | 3.5 | 2 | 2 |
2.50—4.00 | 7.00 | 4.5 | 2 | 2 |