Specification Brand : Visionären BulletPoint1 : Graded circle test from 400 seconds now down to 20 seconds BulletPoint2 : No monocular clues with NEW Technology BulletPoint3 : New improved booklet BulletPoint4 : Answer key on back cover BulletPoint5 : Includes both adult and pediatric polarized viewers ItemName : Stereo Fly Acuity Test W/Pediatric & Standard Polarized Viewers ItemPackageQuantity : 1 ItemTypeKeyword : therapeutic-eye-charts Manufacturer : VAC NumberOfItems : 1 PartNumber : 1000S ProductDescription : Designed to rapidly test for amblyopia and strabismus using gross thru fine stereopsis (2500 to 20 seconds of arc). Graded circle test from 400 seconds now down to 20 seconds with no monocular clues. New improved booklet has answer key on back cover and includes polarized viewers. ProductSiteLaunchDate : 2015-06-18T12:02:28.447Z