DoubleSight Displays DS-15xx - Manual (Page 37)

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Recommended Use
Placement
Correct placement and adjustment of the monitor can reduce eye,
shoulder, and neck fatigue. Check the following when you position
the monitor:
• Keep the top of the monitor screen at or slightly below eye
level. Your eyes should look slightly downward when viewing
the middle of the screen.
• Position your monitor no closer than 16 inches and no further
away than 30 inches from your eyes. The optimal distance is
25 inches.
It is recommended that
you keep the screen
below your eye level.