User's Manual

[How to Focus the Vision Screener]

Eyes should be wide open and kept on the center of the frame for best results.

4. Measurement Environment

- For optimal screening results, screen in an environment with lower level subdued

lighting.

Be sure to eliminate or block any sources of sunlight and/or incandescent light from

reflecting on the subject’s eyes.

Florescent light is acceptable but note that the subject’s pupil size can be affected and

can decrease your chances of a successful screening.

A minimum of 4mm pupil size is required for measurements. Sometimes it is difficult to

measure because of room or light. If the pupil is too small, the user must adjust the

light in the space. The best result is bigger than 5mm

CAUTION