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Related Experiment Video

Updated: May 16, 2026

Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
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Quantifying age-related differences in visual-discrimination capacity: drivers with and without visual impairment.

Carolina Ortiz1, José J Castro, Aixa Alarcón

  • 1Department of Optics, Laboratory of Vision Sciences and Applications, University of Granada, Edificio Mecenas, Av. Fuentenueva s/n, Granada, Spain. ortizh@ugr.es

Applied Ergonomics
|December 11, 2012
PubMed
Summary

Aging and visual impairment significantly reduce driving vision quality and performance, even with adequate visual acuity. New Halo software helps quantify night vision disturbances, crucial for older drivers

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Area of Science:

  • Ophthalmology
  • Gerontology
  • Transportation Safety

Background:

  • Aging and visual impairments like cataracts can affect visual functions critical for driving.
  • Standard visual acuity tests may not fully capture functional vision deficits in older drivers.
  • Night vision disturbances are a common complaint among drivers, impacting safety.

Purpose of the Study:

  • To investigate the impact of aging and visual impairment on retinal image quality and driver visual performance.
  • To evaluate the utility of Halo v1.0 software in quantifying visual discrimination capacity and disturbances.

Main Methods:

  • Study included 55 normal vision subjects and 15 older subjects with cataracts.
  • Comprehensive eye examinations included visual acuity, contrast sensitivity, and optical quality.
  • Halo v1.0 software assessed visual discrimination capacity; Driving Habits Questionnaire (DHQ) was administered.

Main Results:

  • Older drivers, with or without cataracts, exhibited significantly worse visual performance and retinal image quality (p < 0.05).
  • These deficits persisted even when binocular visual acuity met the ≥20/25 driving license standard.
  • Halo software effectively quantified night vision disturbances like halos.

Conclusions:

  • Certain visual functions crucial for driving are diminished in older drivers, irrespective of meeting basic visual acuity requirements.
  • Retinal image quality and visual performance decline with age and visual impairment.
  • Halo software is a valuable tool for assessing night vision disturbances in clinical practice, particularly for driver licensing.