crossword science

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Across
  1. 3. light can get through it and we can see through it
  2. 7. Nerve taking things from the eye to the brain
  3. 9. a piece of glass that can be used for glasses and it is also other transparent material with curved sides
  4. 10. the throwing back by a body or surface of light
Down
  1. 1. a layer at the back of the eyeball that contains cells sensitive to light
  2. 2. it is the colour part of the eye like mine is green
  3. 4. when the thing that you are using changes place and bends
  4. 5. you can sort of see through it and you can also shine a light through it and see it faintly.
  5. 6. something that light can't get through
  6. 8. is the transparent layer protecting the eye and forming the front of the eye.