Sources of error in intraocular lens power calculation

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Abstract
R chamber depth (ACD) is proposed. Based on preoperative and postoperative biometry of 584 IOL implantations, 54% of the error was attributed to axial length errors, 8% to corneal power errors, and 38% to errors in the estimation of the postoperative ACD, when a fired ACD was used in the IOL calculations. However, if the ACD was predicted according to a previously described regression method, the contribution of error from the ACD source was reduced to 22%, thereby reducing the total refractive prediction error from ±1.03 diopters (D) (±SD) to ±0.92 D (±SD). These predictions accord with clinical results. aReprint requests to Thomas Olsen, M.D., dr. med., University Eye Clinic, Aarhus Kommunehospital, DK-8000 Aarhus C, Denmark. Supported in part by the Danish Medical Research Council, grant no. 12-8138. © Williams & Wilkins 1992. All Rights Reserved....

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