Back to articles
Volume: 31 | Article ID: art00004
Investigation of the effect of pupil diameter on visual acuity using a neuro-physiological model of the human eye
  DOI :  10.2352/ISSN.2470-1173.2019.12.HVEI-207  Published OnlineJanuary 2019

Human visual acuity strongly depends on environmental conditions. One of the most important physical parameters affecting its value is the pupil diameter, which follows changes in the surrounding illumination by adaptation. Thus, the direct measurement of its influence on visual performance would require either medicaments or inconvenient apertures placed in front of the subjects? eyes to examine different pupil sizes, so it has not been studied in detail yet. In order to analyze this effect directly, without any external intervention, we accomplished simulations by our complex neuro-physiological vision model. It considers subjects as ideal observers limited by optical and neural filtering, as well as neural noise, and represents character recognition by templatematching. Using the model, we reconstructed the monocular visual acuity of real subjects with optical filtering calculated from the measured wavefront aberration of their eyes. According to our simulations, 1 mm alteration in the pupil diameter causes 0.05 logMAR change in the visual acuity value on average. Our result is in good agreement with former clinical experience derived indirectly from measurements that had independently analyzed the effect of background illumination on pupil size and on visual quality.

Subject Areas :
Views 34
Downloads 3
 articleview.views 34
 articleview.downloads 3
  Cite this article 

Csilla Timár-Fülep, Gábor Erdei, "Investigation of the effect of pupil diameter on visual acuity using a neuro-physiological model of the human eyein Proc. IS&T Int’l. Symp. on Electronic Imaging: Human Vision and Electronic Imaging,  2019,  pp 207-1 - 207-7,

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 2019
Electronic Imaging
Society for Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151 USA