Stereo Fly with LEA® Symbols

• Evaluate both gross stereopsis (355 to 700 seconds of arc) and fine depth perception.
• Graded circle test (800 to 40 seconds of arc).
• LEA symbols for children (400, 200 and 100 seconds of arc).

Test includes:

• 1 pair of Standard 3-D Viewers.
• Answer key on back cover.