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Macular pigment affects colour matching because it

  • A.controls how much light is admitted through the pupil
  • B.absorbs short wavelength light in the central retina
  • C.gives off light of its own inside the eyeball
  • D.focuses the image more sharply onto the fovea

Answer: B

Its density varies between individuals and falls with distance from the fovea. It is one of the principal causes of both observer variability and the difference between the two observers. Its density varies widely between individuals.

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