enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. List of optometric abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_optometric...

    Visual acuity with Near chart without correctors Visual acuity with eye chart at Near 15.7 inches (400 mm) and without (sc: Latin sine correctore) correctors (spectacles); Ncc is with (cc: Latin cum correctore) correctors. See Visual_acuity#Legal_definitions: VA OS Left visual acuity VA OD Right visual acuity VDU Visual display unit VF Visual field

  3. Electronystagmography - Wikipedia

    en.wikipedia.org/wiki/Electronystagmography

    Electronystagmography (ENG) is a diagnostic test to record involuntary movements of the eye caused by a condition known as nystagmus. It can also be used to diagnose the cause of vertigo, dizziness or balance dysfunction by testing the vestibular system. [1] Electronystagmography is used to assess voluntary and involuntary eye movements. [2]

  4. Eye chart - Wikipedia

    en.wikipedia.org/wiki/Eye_chart

    An eye chart is a chart used to measure visual acuity comprising lines of optotypes in ranges of sizes. Optotypes are the letters or symbols shown on an eye chart. [ 1 ] Eye charts are often used by health care professionals, such as optometrists , physicians and nurses , to screen persons for vision impairment .

  5. Romberg's test - Wikipedia

    en.wikipedia.org/wiki/Romberg's_test

    Romberg's test, Romberg's sign, or the Romberg maneuver is a test used in an exam of neurological function for balance. The exam is based on the premise that a person requires at least two of the three following senses to maintain balance while standing: proprioception (the ability to know one's body position in space)

  6. Vestibular system - Wikipedia

    en.wikipedia.org/wiki/Vestibular_system

    The vestibular-ocular reflex (VOR) is a reflex eye movement that stabilizes images on the retina during head movement by producing an eye movement in the direction opposite to head movement, thus preserving the image on the center of the visual field. For example, when the head moves to the right, the eyes move to the left, and vice versa.

  7. Vestibulo–ocular reflex - Wikipedia

    en.wikipedia.org/wiki/Vestibulo–ocular_reflex

    After 1 hour of viewing, the integrator becomes "anti-leaky", meaning that its value grows exponentially even in the absence of input. The eye motion becomes positive-feedback, meaning that if it is slightly to the left of a fixation target, it would drift even further to the left, and similarly for the right. It is also accompanied by nausea.

  8. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    Eye examination for visual acuity The LogMAR – ETDRS Chart, designed in 1976, to test for visual acuity. Visual acuity is a measure of the spatial resolution of the visual processing system.

  9. Jaeger chart - Wikipedia

    en.wikipedia.org/wiki/Jaeger_chart

    The Jaeger chart is an eye chart used in testing near visual acuity. It is a card on which paragraphs of text are printed, with the text sizes increasing from 0.37 mm to 2.5 mm. [ 1 ] This card is to be held by a patient at a fixed distance from the eye dependent on the J size being read.