Phenomenological model of visual acuity



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Gómez Pedrero, José Antonio and Alonso Fernández, José (2016) Phenomenological model of visual acuity. Journal of Biomedical Optics, 21 (12). p. 125005. ISSN 1083-3668

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We propose in this work a model for describing visual acuity (VV) as a function of defocus and pupil diameter. Although the model is mainly based on geometrical optics, it also incorporates nongeometrical effects phenomenologically. Compared to similar visual acuity models, the proposed one considers the effect of astigmatism and the variability of best corrected VV among individuals; it also takes into account the accommodation and the “tolerance to defocus,” the latter through a phenomenological parameter. We have fitted the model to the VV data provided in the works of Holladay et al. and Peters, showing the ability of this model to accurately describe the variation of VV against blur and pupil diameter. We have also performed a comparison between the proposed model and others previously published in the literature. The model is mainly intended for use in the design of ophthalmic compensations, but it can also be useful in other fields such as visual ergonomics, design of visual tests, and optical instrumentation.

Item Type:Article
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Received July 14, 2016; Accepted November 17, 2016; published online Dec. 14, 2016

Uncontrolled Keywords:visual acuity; defocus; model fitting; ophthalmic optics.
Subjects:Medical sciences > Optics > Optometry
Medical sciences > Optics > Visual perception
ID Code:40627
Deposited On:21 Dec 2016 11:08
Last Modified:21 Dec 2016 11:08

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