How the eye works?

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  • Light rays pass through the cornea, which focus them.
  • The pupil in the iris expands (in dark) and contracts (in bright) depending upon the light condition.
  • The lens fine-tunes the focusing.
  • The image lands on the retina, a complex system of nerve cells, which converts light into impulses. Are these impulses then sent to the brain via optic nerve.
  • The brain interprets these impulses and converts impulses into color image.
  • The eye is strong and remarkably adaptable, but being an organic mechanism, it does not work perfectly. The eye is especially prone to slight irregularities and requires glasses to see more clearly.