OPF nuclear bang protection googles, USSR, protection glasses military, rare

Description

BPA - Burns photochromic glasses
automatic black on great light (from atomic bang :) )
wiki:
Safety glasses BPA are designed to protect the eyes from burn injuries and reduce the duration of the adaptation glare BIG BANG  in operations personnel outside the objects of weapons and military equipment and shelters.
Eye protection is achieved by BIG BANG light pulse energy absorption of the photochromic and infrared filters.
Rubber housing is made of points on the perimeter contour to the face and is provided with a venting device with labyrinth channels, excluding direct exposure to under glass space. Points are retained on the head using an adjustable helmet size of the rubber, which is attached to the plastic housing and earphones.