Colour recognition at large visual eccentricities in normal observers and patients with low vision.

Abstract:

:When we look at our spatial environment we have the feeling that the whole visual field is coloured, yet the density of cone photoreceptors decreases considerably as eccentricity increases. We investigated colour perception (coloured/noncoloured), colour naming and whether colour helps object recognition at eccentricities varying from 0 degrees to 80 degrees in healthy observers and patients with low vision. We found that colours can be perceived and even identified above chance at very large eccentricities (60 degrees). When asked to categorize coloured and grey level objects as edible/nonedible, both healthy observers and patients with low vision showed better performance for coloured edible objects at 50 degrees suggesting that colour is used for object recognition in conditions of degraded form perception.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Naïli F,Despretz P,Boucart M

doi

10.1097/01.wnr.0000236864.54575.98

subject

Has Abstract

pub_date

2006-10-23 00:00:00

pages

1571-4

issue

15

eissn

0959-4965

issn

1473-558X

pii

00001756-200610230-00002

journal_volume

17

pub_type

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