Optical Crossword

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Across
  1. 3. Three focal lengths
  2. 6. This puzzle is
  3. 8. Giver of sight
  4. 9. Sun for poly
  5. 10. Two focal lengths
  6. 12. credit card
  7. 16. Good for truckers
  8. 20. Cylinder
  9. 21. Detects peripheral defects
  10. 23. Shatter resistant
  11. 25. Starbursts
  12. 27. Our brand
  13. 28. Turns polarized
  14. 31. Noonan
  15. 33. P.O.S.
  16. 34. The one who welcomes
  17. 36. Optical device used by Newton
  18. 37. Three years
  19. 39. Near-sighted
  20. 40. Code of
Down
  1. 1. Night bird
  2. 2. Passageway
  3. 4. Who you know
  4. 5. House shell
  5. 7. Gets the darkest
  6. 11. Computer use
  7. 13. John Hancock
  8. 14. Insurance
  9. 15. We are
  10. 17. Timesheet
  11. 18. Far-sighted
  12. 19. Our company
  13. 22. Trials are for
  14. 24. To hold the spectacles
  15. 26. Eye exam
  16. 29. Flo's insurance company
  17. 30. Loss of accommodation
  18. 32. Blinding glare reducer
  19. 35. HEV rays
  20. 38. 1.67