The Eye

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Across
  1. 3. the hole in the iris that allows light to enter the eye
  2. 6. the bending of light as it passes through the eye
  3. 8. where the sensory neurones leave the eye
  4. 9. used to adjust the thickness of the lens
  5. 13. the ciliary muscles relax when we are looking at these objects
  6. 15. the receptors that are able to detect coloured light
  7. 16. transparent section of the sclera
  8. 18. region of the retina where there are no light receptors
Down
  1. 1. attached the lens to the ciliary muscles
  2. 2. an action that is rapid and involuntary
  3. 4. tough and white outer layer of the eye
  4. 5. shape of the len
  5. 6. the layer of cells containing light receptors
  6. 7. dark layer of the eye where blood vessels are found
  7. 10. coloured muscles that adjust the size of the pupil
  8. 11. this muscle contracts to dilate our pupils
  9. 12. in bright light the pupil does this
  10. 14. area of the retina with a high concentration of cones
  11. 17. the receptors that work best in dim light conditions