Butterfly-S Stereopsis Test with Standard Shapes features:
Graded circle test from 400 seconds now down to 20 seconds No monocular clues with NEW technology New improved booklet Answer key on back cover Includes both adult and pediatric polarized viewers
The Butterfly-S Stereopsis Test with Standard Shapes includes:
Butterfly-S Book Standard Viewer (Adult) Pediatric Viewer Manual
The Butterfly-S Stereopsis Test with Standard Shapes includes: