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Equivalence of two optical quality metrics to predict visual acuity of multifocal pseudophakic patients

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Armengol Cebrian, Jesús and Garzón Jiménez, Nuria and Vega Lerin, Fidel and Altemir Gómez, Irene and Millán García Varela, María Sagrario (2020) Equivalence of two optical quality metrics to predict visual acuity of multifocal pseudophakic patients. Biomedical Optics Express . ISSN 2156-7085 (In Press)

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Official URL: https://doi.org/10.1364/BOE.388531




Abstract

This article studies the relationship between two metrics, the area under the modulation transfer function (MTFa) and the energy efficiency (EE), and their ability to predict the visual quality of patients implanted with multifocal intraocular lenses (IOLs). The optical quality of IOLs is assessed in vitro using two metrics, the MTFa and EE. We measured them for three different multifocal IOLs with parabolic phase profile using image formation, through-focus (TF) scanning, three R, G, B wavelengths, and two pupils. We analyzed the correlation between MTFa and EE. In parallel, clinical defocus curves of visual acuity (VA) were measured and averaged from sets of patients implanted with the same IOLs. An excellent linear correlation was found between the MTFa and EE for the considered IOLs, wavelengths and pupils (R2 > 0.9). We computed the polychromatic TF-MTFa, TF-EE, and derived mathematical relationships between each metrics and clinical average VA. MTFa and EE proved to be equivalent metrics to characterize the optical quality of the studied multifocal IOLs and also in terms of clinical VA predictability.


Item Type:Article
Additional Information:

Received 21 Jan 2020; revised 1 Apr 2020; accepted 3 Apr 2020

Uncontrolled Keywords:Visual acuity; Pseudophakic patients; Multifocal pseudophakic; Visual quality; Intraocular lenses; IOLs; Multifocal intraocular lenses
Subjects:Medical sciences > Optics
Medical sciences > Optics > Visual perception
ID Code:59959
Deposited On:19 Apr 2020 15:15
Last Modified:20 Apr 2020 07:08

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