colour blindness


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colour blindness

col·or blind·ness

(kŏl'ŏr blīnd'nĕs)
Misleading term for anomalous or deficient color vision; complete color blindness is the absence of one of the primary cone pigments of the retina.
See: protanopia, deuteranopia, tritanopia
Synonym(s): colour blindness.

colour blindness

An inaccurate term for a lack of perceptual sensitivity to certain colours. Absolute colour blindness is almost unknown. Most colour perception defects are for red or green or both. About 10% of males have a colour perception defect, but this is rare in females.

colour blindness

a condition in which certain colours cannot be distinguished, due to a lack of one or more colour-absorbing pigments in the CONE CELLS of the retina. Colour blindness can be caused by acquired diseases of the retina but in the vast majority of cases it is inherited. In humans the most common example is red/green colourblindness which is a sex-linked defect caused by a recessive gene and is thus more common in males than females; See SEX LINKAGE.

col·or blind·ness

(kŏl'ŏr blīnd'nĕs)
Misleading term for anomalous or deficient color vision; complete color blindness is the absence of one of the primary cone pigments of the retina.
Synonym(s): colour blindness.
References in periodicals archive ?
The general causes of colour blindness are well known but the Moorfields study findings need more research to assess whether this revelation about the UAE people is due to genetic or acquired factors (such as excessive exposure to sunlight or Vitamin D deficiency), according to the team.
These days, colour blindness even has an effect on the restaurants I review for the Saturday Mag.
Colour blindness is usually classed as a mild disability.
People with the common, inherited types of colour blindness have the defect for life.
Dad-of-two James Kinloch has had his colour blindness cured, thanks to amazing new contact lenses.
Although colour blindness is only moderately life-altering, we have shown that we can cure a cone disease in a primate very safely.
Stewart Vernon, 72, said the coloured forms would confuse voters with colour blindness.
I KNOW my colour blindness is bad (it prevents me from playing the piano) but what about all the poor cyclists who pedal up and down our roads?
Mr Harris invented ChromaGen filters in 1996, originally to help people with colour blindness.
I suggest that a colour blindness check be added to the driving test.
However,my real concern,at the risk of upsetting fellow pensioner drivers, is defective eye sight, especially those defects that cannot be corrected by glasses, such as tunnel vision or colour blindness.
CARDIFF is the new capital of colour blindness after 'The Bluebirds' unveiled their new RED strip.