Around 20 years ago I purchased a surplus Steiner 7x50 binocular. I did a little research and discovered that it had a laser shield built in.
Also learned that it slightly harmed resolution. I have no idea how it worked or if it would work with those lasers.
Those are great binoculars. Did yours have an integrated compass?
There is a wonderful video advertising Steiner Marine binoculars. There is a beautiful shot of an eagle at time 1:45. You can skip through the boring parts before that.
Never a good idea to look at a laser, and binoculars only amplify the laser energy, same as they amplify the light between the binocular aperture and your eye.
Filters can be used to remove the laser energy from the rest of the visible energy to protect your eye, but you have to have a filter that matches the frequency of the laser, and that can be hard to predict since there are many laser sources to choose from these days and each produces its own frequency of laser beam.
That is why the easy access to lasers today is such a threat to aviation, whether its military or commercial. There are laws prohibiting shining lasers at aircraft, but our adversaries have been known to point beams at our aircraft and pilot blindness can be the result. I believe its considered an attack and would warrant response, but its also hard to prove in many cases. Detection requires good sensors tuned to the exact frequency of the source again. That’s not always practical.
Did the binoculars have a battery? If so, they probably had something akin to the view port on a welder’s helmet.