Which part of eye controls size of a pupil ?

The correct answer is Iris.Key Points

• Iris part of eye controls size of a pupil.
• Iris is a dark muscular diaphragm that controls the size of the pupil.
  • The pupil is a small empty space surrounded by the iris.
  • The pupil regulates and controls the amount of light entering the eye. 
  • The iris contracts and relaxes to regulate the size of the pupil.
  • When it is dark, the pupil expands to allow more light to enter the eye.
  • Iris controls the pupil which in turn controls the amount of light entering the eye. 

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