Changes in color vision with decreasing light level: separating the effects of normal aging from disease

Barbur, John L.; Konstantakopoulou, Evgenia

doi:10.1364/josaa.29.000a27

Cited by 20 publications

(28 citation statements)

References 37 publications

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“…Color vision alterations are also associated with systemic diseases such as multiple sclerosis and diabetes, ocular diseases such as cataract, glaucoma, and optic neuropathy [26,50].…”

Section: Color Visionmentioning

confidence: 99%

Vision, light and aging: A literature overview on older-age workers

Nylén

Favero

Glimne

et al. 2014

Work

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BACKGROUND: In many western countries individuals will need to continue their professional careers beyond the current retirement age. This requires adaptation of the working conditions to compensate for age related visual changes. OBJECTIVE: The aim of this paper is to compile and structure knowledge concerning age related changes in visual and nonvisual functions among older-age workers and to describe in what way these changes relate to light and work performance. METHOD: An overview of the literature was performed in PubMed and EMBASE concerning visual changes among elderly people, light, visual ergonomics and consequences at work. RESULTS: Visual conditions and lighting design have an impact on work performance in those over age 65 even if there are few studies available. Natural age related changes in the eyes or ocular diseases can result in reduced visual function and performance. Moreover, evidence of the importance of light and dark rhythms for circadian regulation is mounting; there are indications that the older-age population might need specific attention related to this issue. Finally, visual deteriorations might also, secondarily, induce strained postures and musculoskeletal symptoms, pain and injury. CONCLUSION: Age-related changes in the eyes and also ocular diseases among older-age people have an impact on well-being and work performance, and therefore call for reconsideration of their working conditions. Knowledge about how visual functions, light and ocular diseases is needed for work design and preventive actions.

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“…Color vision alterations are also associated with systemic diseases such as multiple sclerosis and diabetes, ocular diseases such as cataract, glaucoma, and optic neuropathy [26,50].…”

Section: Color Visionmentioning

confidence: 99%

Vision, light and aging: A literature overview on older-age workers

Nylén

Favero

Glimne

et al. 2014

Work

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“…Modern graphics cards for control of computer-based color vision tests have become popular because of their ease of use, ability to test simultaneously different directions in color space, and incorporation of rigorous psychophysical procedures {e.g., Cambridge Color Test (CCT) [15,16] and Color Assessment and Diagnosis (CAD) test [17]}. All of these tests are designed based on congenital color vision deficiencies, but they also have proven valuable for detecting acquired deficiencies of color vision [18–22]. …”

Section: Introductionmentioning

confidence: 99%

Discrimination thresholds of normal and anomalous trichromats: Model of senescent changes in ocular media density on the Cambridge Colour Test

Shinomori¹,

Panorgias²,

Werner³

2016

J. Opt. Soc. Am. A

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Age-related changes in chromatic discrimination along dichromatic confusion lines were measured with the Cambridge Colour Test (CCT). One hundred and sixty-two individuals (16 to 88 years old) with normal Rayleigh matches were the major focus of this paper. An additional 32 anomalous trichromats classified by their Rayleigh matches were also tested. All subjects were screened to rule out abnormalities of the anterior and posterior segments. Thresholds on all three chromatic vectors measured with the CCT showed age-related increases. Protan and deutan vector thresholds increased linearly with age while the tritan vector threshold was described with a bilinear model. Analysis and modeling demonstrated that the nominal vectors of the CCT are shifted by senescent changes in ocular media density, and a method for correcting the CCT vectors is demonstrated. A correction for these shifts indicates that classification among individuals of different ages is unaffected. New vector thresholds for elderly observers and for all age groups are suggested based on calculated tolerance limits.

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“…Absolute thresholds for detection of flashed stimuli, however useful, are often the final component of visual function to be affected in disease. Sensitivity for detection of fine spatial detail, motion and colour signals can be selectively damaged in many diseases of the eye and often precedes visual field loss (Barbur and Konstantakopoulou 2012, Bergin et al 2011, Hawkins et al 2003, Lee 1991, Westcott et al 1998, Bullimore et al 1993, Zihl et al 1983, Marré and Marré 1986, Verriest 1963, Krastel and Moreland 1991. Cerebrovascular accidents have also been shown to cause impaired contrast sensitivity (Fisk et al 2002) and colour vision loss (Rauscher et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Assessment of novel binocular colour, motion and contrast tests in glaucoma

et al. 2013

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This is the unspecified version of the paper.This version of the publication may differ from the final published version. The effects of glaucoma on binocular visual sensitivity for detection of different stimulus attributes were investigated at the fovea and in four paracentral retinal regions. The study employed a number of visual stimuli designed to isolate the processing of different stimulus attributes. We measured absolute contrast detection thresholds and functional contrast sensitivity using Landolt ring stimuli. This psychophysical Landolt C based contrast test of detection and gap discrimination allowed us to test parafoveally at 6° from fixation as well as foveally employing interleaved testing locations. First-order motion perception was examined using moving stimuli embedded in static luminance contrast noise. Red/green (RG) and yellow/blue (YB) colour thresholds were measured with the Colour Assessment and Diagnosis (CAD) test, which utilises random dynamic luminance contrast noise (±45%) to ensure that only colour and not luminance signals are available for target detection. Subjects were normal controls (n = 65) and glaucoma patients with binocular visual field defects (n = 15), classified based on their Humphrey Field Analyzer mean deviation (MD) scores. The impairment of visual function varied depending on the stimulus attribute and location tested. There was also a progression of loss for all tests as the degree of glaucoma increased. For subjects with mild glaucoma (MD -0.01dB to -6.00dB) significantly more data points fell outside the normal age-representative range for RG colour thresholds than for any other visual test, followed by Motion thresholds. This was particularly the case for the parafoveal data compared to the foveal data. The findings suggest that a multifaceted measure of binocular visual performance, incorporating RG colour and motion testing at multiple locations, may provide a better index for comparison with QOL measures in glaucoma. Permanent repository link

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Changes in color vision with decreasing light level: separating the effects of normal aging from disease

Cited by 20 publications

References 37 publications

Vision, light and aging: A literature overview on older-age workers

Vision, light and aging: A literature overview on older-age workers

Discrimination thresholds of normal and anomalous trichromats: Model of senescent changes in ocular media density on the Cambridge Colour Test

Assessment of novel binocular colour, motion and contrast tests in glaucoma

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