Welch Allyn LumiView Instructions De Fonctionnement page 22

Problem
Instrument does not illuminate.
Image is distorted or double image
is seen.
How do I utilize bifocals?
18
Solution
Replace 08500 lamp.
See page 11 for instructions.
Battery is expired or discharged.
See page 15 and 16.
Instrument must be set correctly for
interpupillary distance adjustment. 
See page 9 for instructions.
Depth perception is slightly altered 
with 3D optical design. Continued 
usage will improve comfort level.
Install bifocal lenses so that only the 
upper third is for distance and lower 
two-thirds is for reading. Adjust the 
nose bridge so that frame sits higher 
on nose. Then lower the height 
adjustment. This will ensure that
the binocular viewing system will 
be positioned in front of the reading 
part of the lenses.