Welch Allyn LumiView Portable Binocular Microscope - User Manual - Manual (Page 22)

Instrument does not illuminate. Replace 08500 lamp. 
See page 11 for instructions.
Battery is expired or discharged. 
See page 15 and 16.
Image is distorted or double image
is seen. 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.
How do I utilize bifocals? 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.
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Problem Solution