the eyes

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Across
  1. 2. protective layer of the eye
  2. 3. snel backwards
  3. 8. windows
  4. 10. solid looking
Down
  1. 1. only light comes through
  2. 4. doing fractions again
  3. 5. boring if no colour
  4. 6. send the images!
  5. 7. not seeing upside-down
  6. 9. mirror