Butterfly-S

• Rapid test for amblyopia & strabismus using gross thru fine stereopsis

• Random Dot Butterfly image for testing gross steropsis (2000 seconds of arc)

• Graded Circle Test from 400 seconds down to 20 seconds of arc

• Shapes for testing children at 400, 200 & 100 seconds of arc

• New technology eliminates monocular clues

• Answer Key on back cover

• Includes: Manual and both Pediatric & Standard Polarized Viewers

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