Visual acuity test


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Related to Visual acuity test: Snellen chart

Visual acuity test

An eye examination that determines sharpness of vision, typically performed by identifying objects and/or letters on an eye chart.
Mentioned in: Optic Neuritis

visual

pertaining to vision.

visual acuity test
performed by walking the animal through an obstacle course. A room full of unfamiliar furniture, or a stairway is usually used for companion animals. Farm animals are led or driven through a passage with drums or boxes strewn across it.
visual cortex
the part of the cerebral cortex which deals with images received by the visual apparatus.
visual evoked potentials (VEPs)
see visual evoked response.
visual following
movement of the eyes in watching a moving object.
visual pathway
the bulk of the retinal ganglion cells have axons in the optic nerve which synapse with cells in the lateral geniculate nucleus in the thalamus, which project to the visual cortex in the occipital lobe of the cerebrum; in a secondary visual pathway the axons of the remainder of the retinal ganglion cells terminate in the anterior rostral colliculus (pretectal region).
visual system
includes the eye, the optic nerve and the optic cortex in the cerebrum. The oculomotor, trochlear, abducent, trigeminal and facial nerves are all involved in reflexes which are part of the animal's responses to visual stimuli.
visual yellow
all-trans retinal; see retinal (2).
References in periodicals archive ?
Visual vestibular interaction in the dynamic visual acuity test during voluntary head rotation.
Chronic care teams struggled to organise patients and perform visual acuity tests, and therefore photography often started late in the morning.
After their agreement in participation, all observers passed through visual acuity tests, and then were randomly selected to one of the experimental groups.
Rivers went to great lengths to sign-off the achievements of Islanders on the visual acuity tests as `not unusual', supposedly to distance native people from animals.
If we can assess the ocular motor balance, visual acuities (distance and near) and the accommodative function of the child--and we can do all these things on most children using basic techniques such as cover test, visual acuity tests, dynamic retinoscopy--then we should be using these functional assessments to modify the prescription we give.