DIP: Topic 8: Introduction to structure of human eye

Introduction to structure of human eye
  • The lens focuses light from objects onto the retina.
  • The retina is covered with light receptors called cones (6-7 million) and rods (75-150 million).
  • Cones are concentrated around the fovea and are very sensitive to colour.
  • Rods are more spread out and are sensitive to low levels of illumination.
  1. Each cone is connected to each own nerve end.
 They can resolve fine details
 Sensitive to color

      2. Many rods are connected to a single nerve end

 Limited resolution with respect to cones
 Not sensitive to color
 Sensitive to low level illumination.

                                            

Density of cones and rods across a section of the right eye

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