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Computer-integrated method for determining the acceptable errors in measuring aphakia eye parameters in the treatment of cataracts

Acceptable errors of eye optical system parameters preoperative biometrics are substantiated. It allows to determine intraocular lens (IOL) optical power with the accuracy that provides the error of planned postoperative refraction within ±0.25 diopters. It was found that depending on the location of the IOL in the patient's eye, allowable error in determining the required IOL optical power for emetropic postoperative refraction is from ±0.3 to ±0.42 diopters, and for the average eye optical system is within ±0.337 diopters. It is shown that allowable error in determining the required optical power of the implanted IOL is provided if geometric parameters of aphakia eye – the average radius of cornea curvature, the IOL location in the eye and the focal length of the virtual paraxial component, are measured with the same permissible errors ±0.055 mm.