colour vision


Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to colour vision: color vision, colour blindness

colour vision

the ability of some animal groups to detect colour in an object, which is due in vertebrates to the activity of CONE CELLS in the retina of the eye. According to the TRICHROMATIC THEORY of colour vision, our perception of a multitude of colours is made possible by differential stimulation of only three types of cone cell, each containing a different coloured pigment (see IODOPSIN). Examples of animals with colour vision include primates, many fishes, and most birds and insects. Animals without colour vision probably see objects in shades of grey (monochrome vision).
References in periodicals archive ?
Most daltonians report that their altered colour vision brings about difficulties in everyday tasks where colour is involved.
An interest in colour vision continued into their studies, with the siblings investigating the possibility of using Skittles and M&Ms to test colour vision in children for their final year project.
The owner Dietmar Hilgert dreams of running Berghain in the Gold Cup because he bred Colour Vision, who won the race a few years ago," said Hirschberger.
Spalding JAB: Doctors with inherited colour vision deficiency: their difficulties in clinical work.
Key Words: Colour Vision Deficiency (CVD), frequency, shade selection, restorative dentist.
Normal colour vision is actually trichromatic that is the combination of red, green, and blue lights (Curcio et al.
Despite these findings, there is disagreement in the literature to various tests of colour vision, its interpretation, and its association with diabetic retinopathy.
Damage to certain parts of the eye that occurs as a result of high blood pressure could ultimately lead to vision loss and it's possible that impaired colour vision could be a sign of future problems related to high blood pressure, BBC health reported.
Takuhei Shoji from Saitama Medical University in Japan and colleagues evaluated the relationship between colour vision and eye disease, heart-related risk factors and lifestyle habits.
The role of hypoxia in the colour vision changes has recently been stressed by the findings of Dean et al [8], who show that the colour deficits in diabetics with retinopathy can be partially reversed by inhalation of oxygen.
Trained by Saeed Bin Surour, Ahzeemah and Colour vision are among 13 entries headed by last year's winner Times Up.
uk Saddler's can have his day in the sun Colour Vision Opinion Poll PLUS 4-pages of scottish jobs 04 Ascot 05 '' 06 '' 07 '' 08 Warwick 09 Ripon 10 Leicester k today from page 45 TURN TO PAGE TWO de