About

Test taker will recognize the direction of the letter C as it shoots across the screen. Wait for a C to shoot left to right across the screen at varying speeds. Press arrows up, down, left, right to indicate C direction as quickly as possible. Head is free to move at all times.

What is the test? In this test the user is allowed free head and eye movement to follow the target and identify the direction of the Landolt-C. Stimuli size is 20/100.

What is the purpose of the test? This test measures the speed and accuracy of your eye movement.

Why is this important? The test removes subjectivity by recognizing the location of the eye in real time, and only showing stimuli when the eye location is in a specific target, ensuring excellent test-retest reliability.

The RightEye DVA tests shows a Landolt-C with a gap located in one of four positions with speed topping out at 53 mph. Logic with the tests ensures accuracy of the results, removing “guessing” or “luck”.

Metrics

DVA3 refers to what speed you can accurately identify a moving target the size of 20/100 when your head is allowed free movement.

Speed (mph): measures the speed of the stimuli in this test ranges from 0-82 miles per hour.

Reaction Time (ms): measures the difference between when the Landolt-C appears on the left of the screen  and when the user presses the button. This is inclusive of visual reaction speed, processing speed and reaction time (button press). The measurement is then averaged over number of trials.