Fig. 9
From: Scleral surgery for the treatment of presbyopia: where are we today?
A representative figure of the effective range of focus (EROF) for a patient eye (60-year-old; 103-OD) after LaserACE. Visual Strehl ratio based upon the optical transfer function (VSOTF) is computed as a function of defocus using a through-focus curve. Through-focus curves are shown for distance (green) and near (red). Reprinted with permission from [56]