The Lang Stereo Test is an easy to use screening test designed for early detection of problems with stereoscopic vision in children and adults without the need for dissociating glasses.
It is suitable for children as young as 30 months by identifying pictures on a card. The test is simple, quick to use and is fun for the child.
Each card shows three objects to be recognised which assess three different levels of stereo acuity.
LANG 1 (cat, car, star) measures from 1200 to 550 seconds of arc.