Optokinetic response
Optokinetic response
Optokinetic response (pronounced: op-toh-ki-net-ik re-sponse) is a combination of saccadic and smooth pursuit eye movements that occur when the entire visual scene drifts across the retina. This response helps to stabilize images on the retina, which is crucial for clear vision.
Etymology
The term "optokinetic" is derived from the Greek words "opto" meaning vision and "kinetic" meaning movement. The term "response" is derived from the Latin word "responsum" meaning something offered in return.
Function
The primary function of the optokinetic response is to prevent motion blur by stabilizing the visual image on the retina during sustained head rotation. This is achieved by moving the eyes in the opposite direction to the perceived motion, thus keeping the image centered on the fovea, the area of the retina with the highest visual acuity.
Related Terms
- Optokinetic nystagmus: A type of nystagmus triggered by a moving visual image. It is a variant of the optokinetic response.
- Optokinetic drum: A diagnostic tool used to elicit optokinetic nystagmus for the purpose of evaluating the function of the vestibular system.
- Optokinetic reflex: A reflexive eye movement that occurs in response to the movement of the visual field.
See Also
External links
- Medical encyclopedia article on Optokinetic response
- Wikipedia's article - Optokinetic response
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