The TNO Stereo Test has been primarily designed as an aid to the early detection of amblyopia in young children of between 2.5 and 5 years old. It can also be used for stereopsis testing in occupational environments. 
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The TNO test consists of three screening plates (Plates I - III) an plate for testing eye suppression (Plate IV) and two plates (Plate V and VI) for the quantitative testing of stereo acuity. 
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Stereo viewing glasses for both adults and children are available separately. Please click here to view.