1. movement
2. motion
3. apparent motion
4. apparent movement
5. pseudopsia
6. mirage
7. op art
8. canal
9. optical illusion
10. parallax
11. film
12. optic
13. trick
14. entasis
15. mach band
16. reverse rotation effect
17. foreshortening
18. stereogram
19. missing square puzzle
20. necker cube
21. blivet
22. benday dots
23. four-color printing
24. phantasm
25. mueller-lyer illusion
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26. omerta
27. café wall illusion
28. hermann grid illusion
29. auditory illusion
30. phantasmagoria
31. figure-ground
32. pseudoptics
33. projector
34. stereoscope
35. foreshorten
36. dream
37. stage combat
38. film technique
39. motion control photography
40. cinematograph
41. kinetoscope
42. seeing disk
43. 3-d
44. perspective
45. distortion
46. sight
47. illusory
48. opacity
49. objective
50. epidiascope
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51. ghost
52. kaleidoscope
53. focus
54. hallucination
55. fusion
56. echo
57. moving picture
58. periscope
59. telescope
60. aberration
61. optician
62. microscope
63. crown glass
64. flint glass
65. reflecting telescope
66. spectroscope
67. ametropia
68. collimator
69. densitometer
70. optical crown
71. prism
72. viewer
73. contrast
74. binoculars
75. diffraction grating
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76. planetarium
77. spherical aberration
78. viewfinder
79. binocular
80. biprism
81. finder
82. grating
83. laser
84. lens system
85. naked
86. opaqueness
87. optical aberration
88. optical flint
89. optical prism
90. polarimeter
91. prism spectroscope
92. pyroscope
93. reflector
94. refracting telescope
95. sextant
96. view finder
97. camera
98. crown lens
99. chromatic aberration
100. coma
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