What is the Titmus Fly test?
This is a test that opticians use, normally with children, to detect stereopsis (the ability to perceive depth).
The optician asks the person to put on a pair of specially tinted glasses and look at a picture. The optician will ask questions and from the responses can work out the level of stereopsis and therefore if the patient has a lack of it, e.g. if they have amblyopia.
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