Table 1.
Nomogram for limbal relaxing incision (LRI) to correct estimated residual astigmatism after AcrySof® IQ Toric T5 intraocular lens (IOL) implantation
| Degree of arc to be incised
| ||
|---|---|---|
| Cylinder (in diopters) | Against-the-rule and oblique | With-the-rule |
| 0.75 | 30 | 50 |
| 1.00 | 40 | 60 |
| 1.50 | 50 | 70 |
| 2.00 | 60 | 80 |
| ≥3.00 | 90 | 100 |
| Patient age | Depth to be incised | |
| Under 70 years | 90% of the central corneal thickness | |
| 70 to 80 years | 85% of the central corneal thickness | |
| Over 80 years | 80% of the central corneal thickness | |
Note: AcrySof® IQ Toric T5 intraocular lens (Alcon Laboratories, Inc., Fort Worth, TX, USA).