Stereo Optical

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

Online Store

Back to Store

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

$235.00

 Quantity:
  • Sign up for Updates:
  • Follow Us: