- - 3-D trick-picture fad of the 1990s
- - '90s optical illusion fad
- - Tricks to observe for tuning a radio
- - *1990s 3-D picture fad
- - 3-D trick-picture fad of the '90s
- - 3-D trick-picture fad
- - Wise men about to look at radio tuner
- - 1990s series of autostereogram books
- - Small cathode-ray tube in radio receiver to help tuning
- - Radio receiver's tuning aide
- - Photoelectric cell
- - Optical illusion book
- - Optical illusion puzzle that reveals a hidden image
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