2022年2月15日 · Dynamic Visual Acuity (DVA) is a behavioral assessment of the Vestibulo-Ocular Reflex (VOR) in response to head movements. During the test, patients move their heads at a consistent speed, while an optotype decreases in size …

2014年5月9日 · The DVAT-NI provides a “low-tech”, objective, behavioral measure of vestibulo-ocular reflex (VOR) function in response to examiner generated (i.e., “passive”) rotational head movement stimuli. The DVAT NI provides a functional, low-cost assessment of gaze stability that can be administered in any clinical environment.

2023年6月8日 · In the non‑instrumented – or bedside – DVA, the patient is seated at the prescribed distance from an eye chart. The examiner asks the patient to read the lowest line without moving the head. This provides the static visual …

2021年11月18日 · Here, we provide a review of commonly applied DVATs and their several uses in clinical ophthalmology. These data indicate that the DVAT has its unique clinical significance in the evaluation of several ocular disorders. Keywords: dynamic visual acuity test, cataract, dizziness, optic neuritis, glaucoma.

2014年5月9日 · Instrumented DVA is a test of gaze stability that uses a computer and a head-mounted rate sensor to trigger randomly oriented optotypes on a distant monitor when rotational head velocities exceed specified criteria for vestibular assessment (typically above 120 degrees/second).

Dynamic visual acuity (DVA) provides an overall functional measure of visual stabilization performance that depends on the vestibulo-ocular reflex (VOR), but also on other processes, including catch-up saccades and likely visual motion processing.

There are two common methods to measure DVA, either a moving target across the visual field of a stationary observer, requiring the use of pursuit eye movements (for targets at speeds of up to 50° per second) or saccades (faster targets) in order for the target image to fall on the fovea, 4 or a stationary target and a moving observer.

2018年9月1日 · We present a review on the visual ability to discriminate fine details of moving objects (DVA: Dynamic Visual Acuity), showing the most relevant differences, which have been attributed to this...

2022年10月5日 · Now that we've performed a static visual acuity assessment, we're introducing the dynamic visual acuity portion of this test. Again, we have the patient using the remote control to indicate the Optotype type direction. However, the new part to this test is that they're going to have their head in motion whilst the Optotype type is being displayed.

Dynamic Visual Acuity (DVA) describes visual image stability where the vestibular ocular reflex (VOR) counters head motion by moving the eyes in the opposite direction to maintain a clear view of the world.