Physiology of the Human Eye

5 important questions on Physiology of the Human Eye

How far the the sides and upwards and downwards does our field of vision reach?

More than 90o to either side, approximately 75o downwards and slightly more than 50o upwards

Is our field of vision for colour or black and white bigger and why?

Black and white, because of the main concentration of cones in the fovea

The smalles luminance a human eye can detect

10^-6cd/m2
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Effects that take place of the  lifetime of the eye (4)

  • Increased rigidity of the lens
  • Reduced ratio of maximum to minimum pupil size
  • Increased absorptance in the eye
  • Increased scattering in cornea, lens, vitreous humour and fundus

Defective colour vision

Only two or one detector type works

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