Consistency is important when you want to compare visual field maps taken at different times.
Before starting, choose a quiet environment with controlled lighting and find a comfortable position in front of your computer.
Try to keep your head in approximately the same position and maintain a steady distance from the screen throughout the test.
Use a physical keyboard
Visual Field Tracker is operated from the keyboard and mouse so that you can keep your attention on the fixation point instead of looking for controls on the screen.
A physical keyboard is required. A phone or tablet without an attached keyboard cannot provide all the controls needed to perform the test.
Keep your display consistent
When repeating a test, try to use the same:
- monitor;
- screen resolution;
- browser zoom;
- display scaling;
- screen brightness and contrast;
- viewing distance;
- same environment lighting conditions
Keeping these conditions similar makes different sessions easier to compare.
Calibrate the screen
You can optionally calibrate your screen. This lets Visual Field Tracker to generate guides on the final report that will help understand the angle where the eventual spots are marked.
Visual Field Tracker generates guides at 10 and 30 degrees with marks at also 20 and 40 degrees
Cover one eye
Each eye is tested separately.
When testing one eye, comfortably cover the opposite eye without pressing on it. Because both hands may be useful for operating the keyboard, choose a comfortable eye cover that can remain in place by itself.
Practice before recording your first test
The most important skill is learning to move the test point without looking at it.
Visual Field Tracker includes a Practice Room where you can become familiar with the controls before creating a real test.
Take as much time as you need. The objective is not to perform the test quickly, but to perform it consistently.