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. 1982 Jan;66(1):53-6.
doi: 10.1136/bjo.66.1.53.

Intraocular lens power calculation for emmetropia: a clinical study

J S Hillman

Intraocular lens power calculation for emmetropia: a clinical study

J S Hillman. Br J Ophthalmol. 1982 Jan.

Abstract

A series of 50 eyes received an intraocular lens (IOL) of power calculated for emmetropia from data of axial length, corneal curvature, and postoperative anterior chamber depth by R. D. Binkhorst's formulae. The postoperative refraction results were compared with those of 100 control eyes which received +19 D standard power IOLs without calculation. The calculated group had postoperative refractions which were closer to emmetropia, and the difference was os statistical significance, with 92% within the +/- 1D range and 98% within the +/- 2 D range from emmetropia. The calculated predictions of postoperative refraction were of a useful level of accuracy. Consideration of the sources of error indicates that there is no justification for the use of IOLs in power steps of less than 1 D. The calculation of IOL power allows the surgeon to control the postoperative refraction and avoid unwanted ametropia.

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References

    1. Ophthalmic Surg. 1976 Fall;7(3):69-82 - PubMed
    1. J Am Intraocul Implant Soc. 1978 Oct;4(4):222-4 - PubMed
    1. J Am Intraocul Implant Soc. 1979 Jul;5(3):213-6 - PubMed
    1. J Am Intraocul Implant Soc. 1979 Oct;5(4):349 - PubMed
    1. Trans Ophthalmol Soc U K. 1980 Apr;100(Pt 1):222-8 - PubMed