Welch Allyn VS100 Welch Allyn Vision Screener - User Manual - Manual (Page 6)

P/N 20146 Rev A Page 6
Screening 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 (See Figure 4). Florescent light is acceptable but note that the subject’s pupil size can
be affected and can decrease your chances of a successful screening.
NOTE: A minimum pupil size of 4mm is required for screening to occur and may be difficult to
achieve in a room with any light source. If the pupils are too small, the vision screener will notify
you on screen to adjust the lighting in the room. For best results, subject’s pupils should be
5mm or greater.
Getting Started
Charging
1. Connect provided AC cord set and power supply/charger together.
2. Gently lift the back of the vision screener to view the available connections.
3. Locate the DC power connector on the vision screener and connect the power
supply/charger (see Figure 5). The DC power connector on the power supply/charger will easily
insert into the DC power connector on the vision screener. Using force to connect the power
charger can damage the device and will void the warranty.
4. Plug the AC power cord into an available AC wall outlet to charge the device.
F i g u r e 4