Stereo Optical

1-773-867-0380 or 1-800-344-9500

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Butterfly with LEA Symbols

Tests and evaluates random dot stereo depth perception for both gross stereopsis and fine depth perception. 

The test includes:

  • Graded circle test (800 to 40 seconds of arc)
  • LEA symbols for children (400 to 100 seconds of arc)
  • One pair of standard 3-D viewers
  • Answer key on back cover


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