What is Titmus test?
Answer: This is a test which the optometrist uses (normally with children) to detect stereopsis (the ability to perceive depth) and therefore identify conditions where stereopsis is absent eg amblyopia.
What is TNO test?
The TNO stereo test is a commonly used clinical test to evaluate stereopsis and should be conducted while wearing anaglyph glasses. The test pattern was designed with a random dot, and the latest version, 19th edition, contains six test plates.
What is Stereoacuity testing?
Stereoacuity, which is a threshold measure of the acuteness of this depth perception, provides an indication of the level of sensory binocularity an individual has. Reduced stereoacuity can be associated with vision disorders, including strabismus, amblyopia, or significant refractive error.
How do you perform a TNO stereopsis test?
The TNO Stereo test (figure 4) is performed at a distance of 40cm. While wearing red/green anaglyph stereo glasses, the child is first shown Plate I in which two butterflies are presented in a random dot stereogram; one is only visible when both eyes are used, reducing the likelihood of monocular cues.
What is a Randot test?
Randot® Stereotest The Randot Stereotest is aimed for adult stereo testing, but also includes an animal portion for pediatric testing. Adult patients are asked to identify six geometric shapes during testing. This test helps to test the patient depth perception along with normal stereo vision.
Why would a Randot test be performed?
Randot stereotest It is frequently used for detecting amblyopia, strabismus and suppression, and for assessing stereoacuity. The Randot test can measure stereoacuity to 20 seconds of arc. The randot stereotest is more sensitive to monocular blur than real depth stereotests such as the “Frisby test”.
How does the Randot test work?
The Randot family of tests uses polarised vectographs to present different images to each eye. As humans are not sensitive to the polarisation of light, both images appear the same apart from the disparity.
How does the Randot stereo test work?