- 1). View the diagnostic test pattern on printed cards rather than on a computer screen. Different computer display screens show colors with different levels of intensity and accuracy.
- 2). View from the optimal distance. The test requires that you find patterns in a field of dots and being too close or too far reduces the perceived clarity of the dots. The optimal distance is 2 1/2 feet from the card.
- 3). View in optimal lighting. Standard fluorescent lighting or daylight is optimal. Color-altered light, such as light filtered through a colored lamp cover, can impair your ability to distinguish the colors of the dots.
- 4). View from the optimal angle. Your eyes should be level with the center of the circle of dots and the circle should be directly in front of you.
- 5). Examine each circle carefully. The numbers or letters embedded in the circle of dots might not be apparent at first glance. Time is not a factor measured by the test, so take your time.
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