Opt/ops crossword

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Across
  1. 1. a visual impairment in which an object is seen as two objects
  2. 4. a doctor who diagnoses and treats diseases of the eye
  3. 11. a worker who makes glasses for remedying defects of vision
  4. 12. a circular prison with cells around a surveillance station
  5. 14. a sketchy summary of the main points of an argument
  6. 15. (Greek mythology) is one of a race of giants having a single eye in the middle of their forehead
Down
  1. 2. visual impairment without apparent organic pathology
  2. 3. the removal, and examination of tissue from a living body
  3. 5. including everything visible in one view
  4. 6. relating to or using sight
  5. 7. a huge ceratopsian dinosaur having three horns and a neck heavily armored with a very solid frill
  6. 8. eyesight abnormality in which distant objects appear blurred
  7. 9. a person skilled in testing for defects of vision
  8. 10. an examination, and dissection of a dead body
  9. 13. an examination of a dead body to determine the cause of death