Color discrimination across four life decades assessed by the Cambridge Colour Test

Paramei, Galina V.

doi:10.1364/josaa.29.00a290

Cited by 64 publications

(82 citation statements)

References 22 publications

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“…Despite results reported in the literature that sensitivity to S-cone isolating stimuli declines with age [34][35][36] , we found no correlation between age and sensitivity. This was perhaps unsurprising because our population was of young adults aged 16-40, with a low mean age of 22.1 years.…”

Section: A Psychophysical Resultscontrasting

confidence: 99%

Individual differences provide psychophysical evidence for separate on- and off-pathways deriving from short-wave cones

et al. 2013

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(2014) Individual differences provide psychophysical evidence for separate onand off-pathways deriving from short-wave cones. Journal of the Optical Society of America A, 31 (4). A47-A54. ISSN 1084-7529 This version is available from Sussex Research Online: http://sro.sussex.ac.uk/52508/ This document is made available in accordance with publisher policies and may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the URL above for details on accessing the published version. Copyright and reuse:Sussex Research Online is a digital repository of the research output of the University.Copyright and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable, the material made available in SRO has been checked for eligibility before being made available.Copies of full text items generally can be reproduced, displayed or performed and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. S-cones, S-on, S-off, increments, decrements, individual differences, GWAS.

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Section: A Psychophysical Resultscontrasting

confidence: 99%

Individual differences provide psychophysical evidence for separate on- and off-pathways deriving from short-wave cones

et al. 2013

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“…This means that older children had lower thresholds. This is consistent with the findings of other studies that suggested that chromaticity discrimination is fully developed at the end of adolescence [30,31,38,39]. …”

Section: Discussionsupporting

confidence: 93%

“…After 11 staircase reversals, the program automatically calculated the threshold for that vector as the average of the chromaticities that corresponded to the last six reversals. The step size used in the staircase followed a dynamic rule (for more details on the CCT methodology, see Regan et al [29]; for the CCT norms, see Paramei [28-30]).…”

Section: Methodsmentioning

confidence: 99%

Correlations between color perception and motor function impairment in children with spastic cerebral palsy

Costa

Pereira

2014

Behav Brain Funct

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IntroductionThe aim of the present study was to evaluate color perception thresholds and relate them to the degree of motor impairment in children with spastic cerebral palsy (SCP).MethodsBinocular and monocular chromaticity discrimination thresholds were estimated for the protan, deutan, and tritan color confusion axes in 43 SCP children aged 6–15 years who were classified as tetraplegic (n = 12), diplegic (n = 16), and hemiplegic (n = 15) without ophthalmological complaints. Motor impairment was rated according to the Gross Motor Function Classification System (GMFCS) in five levels of severity.ResultsAnalysis of variance showed significantly reduced discrimination in tetraplegic children (p < 0.001) compared with the diplegic, hemiplegic, and control groups. We also found a positive correlation between chromaticity discrimination thresholds and GMFCS ratings in all of the groups.DiscussionChromaticity discrimination thresholds measured psychophysically were reduced for all three color confusion axis in tetraplegic children compared with normal children. Diplegic and hemiplegic children had similar results as normal children. The finding of a correlation between quantified motor impairment and color discrimination losses in SCP patients is a new observation that might help elucidate the causes of color perception loss in these patients. Visual information is essential for the rehabilitation of CP children. Knowledge of the degree of correlation between vision and motor impairment is valuable when planning a rehabilitation program.

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“…Differences in chromatic sensitivity thresholds measured with static test stimuli were observed between the age groups in four of six colour directions. This was expected, as chromatic sensitivity has been shown to decrease with age (Paramei, 2012;Paramei and Oakley, 2014). Similarly, for dynamic stimuli, the elderly participant group showed higher chromatic thresholds for the studied colour directions, as found in other studies (Barbur and RodriguezCarmona, 2015).…”

Section: Discussionsupporting

confidence: 87%

Differences in Chromatic Sensitivity Estimated Using Static and Dynamic Colour Stimuli

Trukša

Jurasevska

Livzāne

et al. 2017

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

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The current study reports on a novel computerised colour vision test employing static and dynamic stimuli. The aim of the study was to assess if static and dynamic stimuli result in comparable chromatic discrimination thresholds when participant’s age is taken into account. Participants (n = 20) were 21 to 77 years old, had normal colour vision and no history of any eye disease. They all participated in two sessions estimating chromatic sensitivity with static and dynamic stimuli, respectively, with six directions in colour space varying either along the red-green (RG) or yellow- blue (YB) directions. We found no significant differences in chromatic thresholds along a tritan axis obtained with static and dynamic stimuli. However, along protan and deitan axes, chromatic thresholds were lower if estimated using static stimuli than those estimated using the dynamic stimuli. As anticipated, chromatic sensitivity decreased with age and with greater chromatic sensitivity loss along the tritan confusion line. Research results suggest that differences between chromatic thresholds measured with static and dynamic stimuli become more apparent with increasing age of study participant.

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Color discrimination across four life decades assessed by the Cambridge Colour Test

Cited by 64 publications

References 22 publications

Individual differences provide psychophysical evidence for separate on- and off-pathways deriving from short-wave cones

Individual differences provide psychophysical evidence for separate on- and off-pathways deriving from short-wave cones

Correlations between color perception and motor function impairment in children with spastic cerebral palsy

Differences in Chromatic Sensitivity Estimated Using Static and Dynamic Colour Stimuli

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