The eye

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Across
  1. 1. coloured part of eye
  2. 5. the scientific study of sight and the behaviour of light
  3. 7. part of eye that focuses the light passing through it onto the retina
  4. 9. you have 5 of them (sight is one of them)
  5. 11. to which makes things visible
Down
  1. 2. cells in the retina that allows you to see in dim light
  2. 3. layer at the back of your eye
  3. 4. part of eye that controls the amount of light that passes through
  4. 5. type of body part (eye is one of them)
  5. 6. photrecepters in the retina that allows you to see colour
  6. 8. The organ you use to see
  7. 10. the ability to see