The Glare Effect Test and the Impact of Age on Luminosity Thresholds

The glare effect (GE) is an illusion in which a white region appears self-luminous when surrounded by linearly decreasing luminance ramps. It has been shown that the magnitude of the luminosity effect can be modulated by manipulating the luminance range of the gradients. In the present study we tested the thresholds for the GE on two groups of adults: young (20–30 years old) and elderly (60–75 years old). Purpose of our perspective study was to test the possibility of transforming the GE into a test that could easily measure thresholds for luminosity and discomfort glare. The Glare Effect Test (GET) consisted in 101 printed cards that differed from each other for the range of luminance ramps. Participants were assessed with GET and a battery of visual tests: visual acuity, contrast sensitivity, illusion of length perception, and Ishihara test. Specifically in the GET, participants were required to classify cards on the basis of two reference cards (solid black-no gradient; full range black to white gradient). PSEs of the GE show no correlation with the other visual tests, revealing a divergent validity. A significant difference between young and elderly was found: contrary to our original expectations, luminosity thresholds of GE for elderly were higher than those for young, suggesting a non-direct relationship between luminosity perception and discomfort glare.

[1]  M. Campbell,et al.  Presbyopia and the optical changes in the human crystalline lens with age , 1998, Vision Research.

[2]  A. Gilchrist,et al.  The Perception of Luminosity on Different Backgrounds and in Different Illuminations , 1994, Perception.

[3]  D. Todorović.  Lightness, illumination, and gradients. , 2006, Spatial vision.

[4]  J. J. Vos.  Reflections on glare , 2003 .

[5]  Sue J. Kang,et al.  Higher Physical Activity Is Associated with Increased Attentional Network Connectivity in the Healthy Elderly , 2016, Front. Aging Neurosci..

[6]  Jocelyn Faubert,et al.  Visual perception and aging. , 2002, Canadian journal of experimental psychology = Revue canadienne de psychologie experimentale.

[7]  Daniele Zavagno,et al.  The glare effect , 2017 .

[8]  Peter B. Delahunt,et al.  Brightness Enhancement Seen through a Tube , 2010, Perception.

[9]  C Owsley,et al.  Spare the rods, save the cones in aging and age-related maculopathy. , 2000, Investigative ophthalmology & visual science.

[10]  D Zavagno,et al.  Some New Luminance-Gradient Effects , 1999, Perception.

[11]  P. D. Spear,et al.  Neural bases of visual deficits during aging , 1993, Vision Research.

[12]  G. Caputo,et al.  The Glare Effect and the Perception of Luminosity , 2001, Perception.

[13]  R. Weale.  Real light scatter in the human crystalline lens , 2005, Graefe's Archive for Clinical and Experimental Ophthalmology.

[14]  Giuseppe Vallar,et al.  Exploring the syndrome of spatial unilateral neglect through an illusion of length , 2002, Experimental Brain Research.

[15]  J. Gabrieli,et al.  Insights into the ageing mind: a view from cognitive neuroscience , 2004, Nature Reviews Neuroscience.

[16]  Luuk Franssen,et al.  Straylight in the human eye: testing objectivity and optical character of the psychophysical measurement , 2009, Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians.

[17]  Manuel B. Datiles III,et al.  Contrast and glare sensitivity. Association with the type and severity of the cataract. , 1992, Ophthalmology.

[18]  Tom Troscianko,et al.  Cortical distinction between the neural encoding of objects that appear to glow and those that do not. , 2005, Brain research. Cognitive brain research.

[19]  G. Lennerstrand,et al.  AGE VARIATIONS IN NORMAL HUMAN CONTRAST SENSITIVITY , 1979, Acta ophthalmologica.

[20]  Kenneth Knoblauch,et al.  Modeling Psychophysical Data in R , 2012 .

[21]  C. Owsley.  Aging and vision , 2011, Vision Research.

[22]  Denis G. Pelli,et al.  THE DESIGN OF A NEW LETTER CHART FOR MEASURING CONTRAST SENSITIVITY , 1988 .

[23]  Daniele Zavagno,et al.  DOI:10.1068/p5095 Glowing greys and surface-white: The photo-geometric factors of luminosity perception , 2005 .

[24]  L. E. Barbrow.  International Lighting Vocabulary , 1964 .

[25]  E WOLF,et al.  Glare and age. , 1960, Archives of ophthalmology.

[26]  Martin A Mainster,et al.  Glare's causes, consequences, and clinical challenges after a century of ophthalmic study. , 2012, American journal of ophthalmology.

[27]  J. Sjöstrand,et al.  Impairment of contrast sensitivity function (CSF) as a measure of disability glare. , 1986, Investigative ophthalmology & visual science.

[28]  D. Stubbs,et al.  A New Set of Illusions—the Dynamic Luminance-Gradient Illusion and the Breathing Light Illusion , 2006, Perception.

[29]  D. Zavagno,et al.  The animated glare effect: Another case of perceptual causality? , 2008 .

[30]  Zili Liu,et al.  The Glare Effect Does Not Give Rise to a Longer-Lasting Afterimage , 2006, Perception.

[31]  R. Sekuler,et al.  Contrast sensitivity throughout adulthood , 1982, Vision Research.

[32]  Glare sensitivity in early cataracts. , 1993, The British journal of ophthalmology.

[33]  A. Gilchrist,et al.  Perceived area and the luminosity threshold , 1999, Perception & psychophysics.