The test is suitable for children as young as 30 months by identifying pictures on a card at a testing distance of 30-40cm. It is simple, quick to use and fun for the child.
3D objects and disparities:
• Cat 1200″
• Star 600″
• Car 400″
The car now has a disparity of 400"(compared to 550" in the original Lang I), making the gradation between the objects more harmonious.
Dimensions: 6.5 × 4.5 × .25 in (14.5cm x 9.5cm)