A study on disability glare vision in young adult subjects

The full assessment of the visual system must include the evaluation of the optical quality of the eye and neural visual functions. The objective evaluation of the retinal image quality is often carried out by computing the point spread function (PSF) of the eye. The central part of the PSF is associated with optical aberrations and the peripheral areas with scattering contributions. In that sense, visual acuity and contrast sensitivity function tests can be considered the perceptual neural response to those contributions characterizing the eye's PSF. However, in natural viewing conditions, visual acuity tests may provide good vision while contrast sensitivity tests can reveal visual impairment in glare vision conditions, such as exposure to bright light sources or night driving conditions. Here we present an optical instrument for the study of disability glare vision under extended Maxwellian illumination to assess the contrast sensitivity function under glare conditions. The limit of the Total Disability Glare threshold, tolerance, and glare adaptation will be investigated as a function of the angular size of the glare source (GA) and the contrast sensitivity function in young adult subjects.

Automated summary

This passage discusses the importance of evaluating both the optical quality and neural visual functions in assessing the visual system. The point spread function (PSF) is often used to objectively evaluate the retinal image quality, with different areas of the PSF associated with optical aberrations and scattering contributions. Visual acuity and contrast sensitivity function tests are considered as perceptual neural responses to the eye's PSF, and can reveal visual impairments under different conditions such as glare vision. An optical instrument is introduced to study disability glare vision, specifically assessing the contrast sensitivity function under glare conditions using extended Maxwellian illumination. The study aims to investigate the effects of glare source size and contrast sensitivity function on total disability glare threshold, tolerance, and glare adaptation in young adult subjects.