Figure 1: The Ladas-Siddiqui Graph. A topographical comparison of two modern IOL formulae (Holladay I and Sanders-Retzlaff-Kraff/T). The green color highlights areas of clinical agreement where the two formulae differ from each other by ≤0.50 diopters. The red color highlights areas of clinical disparity where the two formulae differ from each other by >0.50 diopters.[18]
![Figure 1: The Ladas-Siddiqui Graph. A topographical comparison of two modern IOL formulae (Holladay I and Sanders-Retzlaff-Kraff/T). The green color highlights areas of clinical agreement where the two formulae differ from each other by ≤0.50 diopters. The red color highlights areas of clinical disparity where the two formulae differ from each other by >0.50 diopters.<sup>[18]</sup>](articles/2017/65/12/images/IndianJOphthalmol_2017_65_12_1289_219871_f1.jpg)