The PASS (Pediatric Assessment of Stereopsis with a Smile) 3 Smile Test Plus is a depth perception test for quantitative assessment of stereopsis in children and non-readers. This set includes 8 Cards (480", 240", 120", 60", 40", 30", Demo & Blank), a carrying case, a pair of the Children's Stereoacuity Glasses, and a pair of the Intermediate Stereoacuity Glasses.
Testing distance is 16"/40cm.