Fig. 12. In this left eye, the steep meridian is at the 120-degree axis and has been delineated by opposing limbal marks. The upper left hand ink mark represents the 6:00 position for orientation. (Reprinted from Hardten DR, Lindstrom RL, Davis EA. Phakic Intraocular Lenses: Principles and Practice. Thorofare, NJ: SLACK Incorporated, 2004, with permission.)