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Creating Correct Blur and its Effect on Accommodation

Cholewiak, SA; Love, GD; Banks, MS

Creating Correct Blur and its Effect on Accommodation Thumbnail


SA Cholewiak

GD Love

MS Banks


Blur occurs naturally when the eye is focused at one distance and an object is presented at another distance. Computer-graphics engineers and vision scientists often wish to create display images that reproduce such depthdependent blur, but their methods are incorrect for that purpose. They take into account the scene geometry, pupil size, and focal distances, but do not properly take into account the optical aberrations of the human eye. We developed a method that, by incorporating the viewer’s optics, yields displayed images that produce retinal images close to the ones that occur in natural viewing. We concentrated on the effects of defocus, chromatic aberration, astigmatism, and spherical aberration and evaluated their effectiveness by conducting experiments in which we attempted to drive the eye’s focusing response (accommodation) through the rendering of these aberrations. We found that accommodation is not driven at all by conventional rendering methods, but that it is driven surprisingly quickly and accurately by our method with defocus and chromatic aberration incorporated. We found some effect of astigmatism but none of spherical aberration. We discuss how the rendering approach can be used in vision science experiments and in the development of ophthalmic/optometric devices and augmented- and virtual-reality displays.


Cholewiak, S., Love, G., & Banks, M. (2018). Creating Correct Blur and its Effect on Accommodation. Journal of Vision, 18(9), 1-29.

Journal Article Type Article
Acceptance Date Jul 14, 2018
Online Publication Date Sep 4, 2018
Publication Date Sep 4, 2018
Deposit Date Jul 16, 2018
Publicly Available Date Sep 11, 2018
Journal Journal of Vision
Publisher Association for Research in Vision and Ophthalmology
Peer Reviewed Peer Reviewed
Volume 18
Issue 9
Pages 1-29


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