The TNO Stereo Test is a widely used diagnostic tool for assessing stereopsis, the ability to perceive depth and three-dimensional structure. This test is particularly valuable in detecting binocular vision disorders such as amblyopia (lazy eye) and strabismus (misalignment of the eyes). Developed by the Netherlands Organization for Applied Scientific Research (TNO), the test employs random dot stereograms and anaglyph glasses to evaluate a patient’s stereoacuity
The TNO Stereo Test consists of a series of plates with random dot patterns. When viewed through red-green anaglyph glasses, these patterns create a three-dimensional image that can only be perceived if both eyes are working together correctly. The test measures disparity values down to 15 seconds of arc, providing a precise assessment of the patient’s depth perception
One of the key advantages of the TNO Stereo Test is its ability to detect even subtle binocular vision problems. Unlike other stereotests that use recognizable shapes or objects, the random dot patterns in the TNO test do not provide monocular cues, ensuring that the test results are solely based on binocular vision
This makes it a highly reliable tool for diagnosing and monitoring conditions that affect stereopsis.
The test is easy to administer and can be used with patients of various ages, including children. It is often used in clinical settings, such as optometry and ophthalmology practices, to screen for and monitor the progression of binocular vision disorders
The TNO Stereo Test is also valuable in research settings, where it is used to study the development and treatment of visual disorders
