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Line 36: The "gain" of the VOR is defined as the change in the eye angle divided by the change in the head angle during the head turn. Ideally the gain of the rotational VOR is 1.0. The gain of the horizontal and vertical VOR is usually close to 1.0, but the gain of the torsional VOR (rotation around the line of sight) is generally low.<ref name="Crawford1991"/> The gain of the translational VOR has to be adjusted for distance, because of the geometry of motion parallax. When the head translates, the angular direction of near targets changes faster than the angular direction of far targets.<ref name="Angelaki2004"/> If the gain of the VOR is wrong (different from 1)~~—for~~—for example, if eye muscles are weak, or if a person puts on a new pair of ~~eyeglasses—then~~eyeglasses—then head movement results in image motion on the retina, resulting in blurred vision. Under such conditions, [[motor learning]] adjusts the gain of the VOR to produce more accurate eye motion. This is what is referred to as VOR adaptation. [[Ethanol]] consumption can disrupt the VOR, reducing dynamic visual acuity.<ref>{{cite journal \| vauthors = Schmäl F, Thiede O, Stoll W \| title = Effect of ethanol on visual-vestibular interactions during vertical linear body acceleration \| journal = Alcoholism, Clinical and Experimental Research \| volume = 27 \| issue = 9 \| pages = 1520–6 \| date = September 2003 \| pmid = 14506414 \| doi = 10.1097/01.ALC.0000087085.98504.8C \| url = http://cat.inist.fr/?aModele=afficheN&cpsidt=15155766 }}</ref> Line 57: == See also == * [[Pursuit movement]] * [[Vestibulocerebellar syndrome]] == References ==

Vestibulo–ocular reflex: Difference between revisions