Butterfly Stereotest with LEA Symbols

The Butterfly Stereotest with LEA® Symbols screen for amblyopia and strabismus using gross thru fine stereopsis.

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

* Graded circle test (800 to 40 seconds of arc)

* LEA symbols for children (400 to 100 seconds of arc)

Test includes:

* 1 pair of Standard 3-D Viewers

* Answer key on back cover