TM 3-4240-280-10

2-3. DESCRIPTION OF ADDITIONALLY AUTHORIZED ITEMS (APP C)
(CONT).
c. Optics/Inserts.
WARNING
Do not wear contact lenses with facepiece.
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Optical insert (1) is available by medical prescription and takes the place of operator’s
eyeglasses while facepiece (2) is being worn.
Prongs (3) on optical insert fit into holes in rubber flanges inside the facepiece to hold the
insert in place.
2-18