Activity Sheet 1: How the Eyes Work

Below is a drawing of the eye with some of the more important parts numbered. Write the names of the parts of the eye and their functions in the proper boxes. The clue list is there to help you. (Move your mouse over the illustration to see a colorized version.) eyeball1              
Number 1 2 3 4 5 6 7
Part Name              
Part Names
  • Lens
  • Retina
  • Ciliary Muscle
  • Optic Nerve
  • Pupil
  • Cornea
  • Iris
  • Contains cells that detect light
  • Opening to the inner eye
  • Controls the size of the pupil
  • Focuses image of object
  • Controls shape of lens
  • Transmits information to brain
  • Outermost transparent layer of eye, begins focusing process
ANSWERS: 1. Cornea. Outermost transparent layer of eye. Begins focusing process. 2. Pupil. Opening to the inner eye. 3. Iris. Controls size of pupil. 4. Lens. Focuses image of object (on retina). 5. Retina. Contains cells that detect light. 6. Ciliary muscle. Controls shape of the eye. 7. Optic Nerve. Transmits information to the brain.
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