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IOL FORMULA REFERENCES
The following IOL Power Calculaon formulas are included in the Scanmate IOL Calculator. The
formulas selected for inclusion are commonly used, and have been rened from earlier models.
IOL power calculaon formulas have evolved from the rst models to become more accurate in
a wider range of cases; selecng the appropriate IOL formula will be based on the individual
praconer’s judgment and experience. The IOL Power Calculaons are based on formulas
published in peer-reviewed journals.
BINKHORST II JEDMED Internal documents, based on Binkhorst, R.D. “Pialls in
Determinaon of Intraocular Lens Power Without Ultrasound.” Ophthalmic
Surgery 7:68 (1976): 69-82.
STORZ CompuScan LT. User Manual.
HAIGIS Haigis, W. Personal communicaon, based on documents prepared July 2,
2008. Received Feb 2, 2009.
HOFFER Q. Hoer, K.J. “The Hoer Q formula: A comparison of theorec and regression
formulas.” Journal of Cataract and Refracve Surgery 19:6 (Nov 1993): 700-
712.
Errata in Journal of Cataract and Refracve Surgery 33:1 (Jan 2007): 2.
Author response in Journal of Cataract and Refracve Surgery 33:1 (Jan 2007):
2-3.
HOLLADAY 1 Holladay J.T., et al. “A three-part system for rening intraocular lens power
calculaons.” Journal of Cataract Refracve Surgery 14:1 (Jan 1988): 17-24.
SRK-II Sanders, D.R., et al. “Comparison of the SRK-II Formula and Other Second
Generaon Formulas.” Journal of Cataract and Refracve Surgery 14:2 (Mar
1988): 136-141.
SRK-T Retzla, JA et al. “Development of the SRK/T Intraocular Lens Implant Power
Calculaon Formula.” Journal of Cataract and Refracve Surgery 16:3 (May
1990): 333-340.
Errata in Journal of Cataract and Refracve Surgery 16:4 (Jul 1990): 528.