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Butterfly Stereo Test

  • The Stereo Butterfly tests and evaluates random dot stereo depth perception for both gross stereopsis (2500 to 1200 seconds of arc) and fine depth perception.
  • The figures present on the test cannot be identified without viewing glasses.
  • Less scary for children than the fly test
  • Graded circle test (800 to 40 seconds of arc)
  • Animal test for children (400 to 100 seconds of arc)