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      The SRKII Formula in the Calculation of Intraocular Lens Power

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          This study compares the predictive accuracy of the SRKII formula for groups with average axial length and long eyes. 344 eyes which underwent cataract extraction with implantation of a posterior-chamber intraocular lens were included in the survey; 246 eyes had an average axial length (22.0–24.49 mm), and 98 eyes had an axial length of more than 24.50 mm. Mean absolute errors were 0.26±0.68 dpt in the first group and 1.16±1.78 dpt in the second group. 94.3% of the average eyes were within 1.0 dpt of the expected refraction, 98.8% within 2.0 dpt, whereas in the long-eye group 58.2% were within 1.0 dpt and 84.7% within 2.0 dpt. The results show that the SRKII formula performed credibly in average-length eyes; in the long eyes the ratio of large refractive deviations was greater than that of the other group.

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          Author and article information

          S. Karger AG
          June 1998
          19 March 1998
          : 212
          : 3
          : 153-156
          Department of Ophthalmology, Ankara Hospital, Ankara, Turkey
          27266 Ophthalmologica 1998;212:153–156
          © 1998 S. Karger AG, Basel

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          Figures: 2, Tables: 1, References: 16, Pages: 4
          Original Paper · Travail original · Originalarbeit


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