Chromatic and luminance losses with multiple sclerosis and optic neuritis measured using dynamic random luminance contrast noise
Data(s) |
01/05/2004
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Resumo |
We measured thresholds for detecting changes in colour and in luminance contrast in observers with multiple sclerosis (MS) and/or optic neuritis (ON) to determine whether reduced sensitivity occurs principally in red-green or blue-yellow second-stage chromatic channels or in an achromatic channel. Colour thresholds for the observers with MS/ON were higher in the red-green direction than in the blue-yellow direction, indicating greater levels of red-green loss than blue-yellow loss. Achromatic thresholds were raised less than either red-green or blue-yellow thresholds, showing less luminance-contrast loss than chromatic loss. With the MS/ON observers, blue-yellow and red-green thresholds were positively correlated but increasing impairment was associated with more rapid changes in red-green thresholds than blue-yellow thresholds. These findings indicate that demyelinating disease selectively reduces sensitivity to colour vision over luminance vision and red-green colours over blue-yellow colours.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Pergamon Press |
Relação |
http://dro.deakin.edu.au/eserv/DU:30002646/n20040892.pdf http://dx.doi.org/10.1111/j.1475-1313.2004.00191.x |
Direitos |
2004, The College of Optometrists |
Palavras-Chave | #colour vision testing #cone-excitation space #luminance vision #multiple sclerosis #optic neuritis |
Tipo |
Journal Article |