Stereo Fly Test SO-001 by Stereo Optical Co., Inc. is a professional-grade stereopsis evaluation tool designed for clinical use. This comprehensive kit includes the standard 3-D vectogram book featuring the classic House Fly test for gross stereopsis, along with circles and animal tests for fine depth perception measurement. The set comes complete with a pair of polarized 3-D glasses and the original instruction manual. Ideal for optometrists, ophthalmologists, and vision screening programs, this test helps identify binocular vision issues and amblyopia in both pediatric and adult patients.