I agree with Stamz, blacking out those gray pixels is the way I'd pick if it's possible. Maybe it could even black out less in time to simulate eye being accustomed to the darkness, and then the darkness would get reset if you looked at a flare/chemlight/gunfire/etc. Like it would slowly turn from the pic in post #24 to the last pic in post #21 but never to the first pic in post #21. And If you looked at a bright object it would reset to pic #24 again.