Vision - The human eye - Processing of light

4 important questions on Vision - The human eye - Processing of light

How is light modified before it reaches the retina?

  1. Puil limits the amount of light entering the eye
  2. The lighte is focussed by the lens.

In what steps is light processed?

  1. Light hits the retina in one eye and activates a reflex
  2. Signal to the optic nerve, to thalamus, to midbrain
  3. Then neurons constrict the pupils.

Whatare the five type of neurons in the retinal layer in the retine of the eye?

  • Photoreceptors
  • Bipolar cells
  • Ganglion cells
  • Amacrine cells
  • Horizontal cells
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