Stereo Fly and Butterfly tests designed to rapidly access Amblyopia and Strabismus using gross through fine stereopsis.
- Now tests down to 20 seconds of arc
- Employs familiar LEA Symbols™ for basic 400, 200 and 100 levels
- Answer key cannot be lost - printed on the back cover
- Tests for 4800 to 20 sec of arc
- No Monocular Clues Includes both Adult and Pediatric Polarized glasses