When a person do not have green cones, then the condition is called as
A
Tritanopes
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B
Protanopes
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C
Deuteranopes
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D
Trichromates
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Solution
The correct option is C Deuteranopes Colour blindness is the inability or decreased the ability to see colour, or perceive colour differences, under normal lighting conditions. The most usual cause is a fault in the development of one or more sets of retinal cones, that perceive colour in light and transmit that information to the optic nerve.
Protanopia is a severe type of colour vision deficiency caused by the complete absence of red retinal photoreceptors.
Deuteranopia is a colour vision deficiency in which the green retinal photoreceptors are absent, moderately affecting red-green colour discrimination.
Tritanopia is a very rare colour vision disturbance in which there are only two cone pigments present and a total absence of blue retinal receptors.