The authors evaluate the postoperative refractive results of 53 patients with extremely short eyes (16.0-20.0 mm) after IOL implantation. As the SRK II formula underestimates the A-constant increase for very short eyes, the authors as a results of the analysis of the set of patients recommend the A-constant recalculation according to formula: A-constant increase = 0.429 x axl x axl - 18.732 x axl + 206.114 and then the calculation of emmetropizing IOL by SRK formula.
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