[Visual-optical assessment of the threshold values of the distortion of observational objects due to lens defects in the flat window glass of the cockpits of transport vehicles].

It has been shown experimentally that the threshold values of optical distortions of test objects projected by a collimator during binocular observation through the lens defects of vehicle transparencies depend on their dioptric value and sign, distance between the observer's eyes and the transparencies as well as on the angle of those latter. The experimentally derived dependences can be used to standardize optical parameters of vehicle transparencies.