HERINGS TEST Meaning and
Definition
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Hering's test is a visual perception experiment that is commonly used to assess the integrity of the visual system, particularly in evaluating binocular vision. It was initially introduced by the German physiologist Ewald Hering in the late 19th century.
The test involves the presentation of alternating black and white vertical stripes of equal width in quick succession. The subject observes these stripes through a pair of red and green glasses, which filter out specific wavelengths of light. When one eye is covered, the person should perceive a stationary gray background with the stripes appearing in red and green. However, if both eyes are open, a horizontal motion is perceived, known as the Hering's illusion. This illusion is created due to the differences in neural processing between the eyes.
Hering's test helps in identifying various visual disorders such as strabismus (misalignment of the eyes), amblyopia (lazy eye), and other binocular vision anomalies. It can also be used to analyze the effectiveness of therapies or interventions aimed at improving binocular vision.
By evaluating the outcomes of Hering's test, eye care professionals can gather valuable information regarding the functioning of the visual system and make informed decisions regarding treatment options. It is an important tool in diagnosing and managing visual conditions, particularly those related to binocular vision.
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