It is performed at a distance of 30-40 cm and allows evaluation of the cooperation between both eyes in forming a single image, starting from the two images that are supplied separately to the brain by the two eyes. Can be used for children over one year of age and adults. Indicated in case of suspected strabismus, amblyopia or reduced sight in one or both eyes or as a screening test for stereoscopic vision. If the kid does not cooperate, the test can be shown and the tester can observe whether the child tries to grasp one of the objects apart from the ball (the fish, the star or the tree). This test contains one ball, one fish, one star, one tree. Ball can be seen by one eye only.
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