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 and quick to use and fun for the child.
There are two versions available. Each card shows three objects to be recognised which assess three different levels of stereo acuity. The Lang Stereo Test 2 contains a star in addition that can be seen with only one eye.
LANG 1 (cat, car, star) measures from 1200 to 550 seconds of arc.
LANG 2 (elephant, car, moon) measures from 600 to 200 seconds of arc.
You may also like the Frisby Stereo Test.