title: Calculation of crystalline lens power using a modification of the Bennett method.
abstract: We present a method for measuring lens power from extended depth OCT biometry, corneal topography, and refraction using an improvement on the Bennett method. A reduced eye model was used to derive a formula for lens power in terms of ocular distances, corneal power, and objective spherical equivalent refraction. An error analysis shows that the formula predicts relaxed lens power with a theoretical accuracy of ± 0.5 D for refractive error ranging from -10 D to + 10 D. The formula was used to calculate lens power in 16 eyes of 8 human subjects. Mean lens power was 24.3 D ± 1.7 D.
authors.affiliation: Ophthalmic Biophysics Center and University of Miami Miller School of Medicine, Miami, FL, USA ; Biomedical Optics and Laser Laboratory, Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL, USA.
authors.forename: Victor M
authors.initials: VM
authors.lastname: Hernandez
authors.affiliation: Ophthalmic Biophysics Center and University of Miami Miller School of Medicine, Miami, FL, USA ; Anne Bates Leach Eye Hospital, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA.
authors.forename: Florence
authors.initials: F
authors.lastname: Cabot
authors.affiliation: Ophthalmic Biophysics Center and University of Miami Miller School of Medicine, Miami, FL, USA.
authors.forename: Marco
authors.initials: M
authors.lastname: Ruggeri
authors.affiliation: Ophthalmic Biophysics Center and University of Miami Miller School of Medicine, Miami, FL, USA.
authors.forename: Carolina
authors.initials: C
authors.lastname: de Freitas
authors.affiliation: Ophthalmic Biophysics Center and University of Miami Miller School of Medicine, Miami, FL, USA ; Biomedical Optics and Laser Laboratory, Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL, USA ; Vision Cooperative Research Centre, Sydney, NSW, Australia ; School of Optometry and Vision Science, University of New South Wales, Sydney, NSW, Australia.
authors.forename: Arthur
authors.initials: A
authors.lastname: Ho
authors.affiliation: Ophthalmic Biophysics Center and University of Miami Miller School of Medicine, Miami, FL, USA ; Anne Bates Leach Eye Hospital, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA.
authors.forename: Sonia
authors.initials: S
authors.lastname: Yoo
authors.affiliation: Ophthalmic Biophysics Center and University of Miami Miller School of Medicine, Miami, FL, USA ; Anne Bates Leach Eye Hospital, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA ; Vision Cooperative Research Centre, Sydney, NSW, Australia.
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Parel
authors.affiliation: Ophthalmic Biophysics Center and University of Miami Miller School of Medicine, Miami, FL, USA ; Biomedical Optics and Laser Laboratory, Department of Biomedical Engineering, University of Miami College of Engineering, Coral Gables, FL, USA.
authors.forename: Fabrice
authors.initials: F
authors.lastname: Manns
keywords: (170.4500) Optical coherence tomography; (170.4580) Optical diagnostics for medicine; (330.7325) Visual optics, metrology; (330.7326) Visual optics, modeling