At a rifle training we were asked to tape up our optics and fire at a target 100 yards down range. Seems impossible but your body/eyesight does some amazing things.
Block your optic and shoot as normal with both eyes open. Line up the rifle as always and just “pretend” you are sighting with the optic. You eyes will compensate for not actually seeing through the optic and you will almost always hit the paper at 100 yards.
Just an odd, handy trick, magical thing your eyes and brain will do. Could be handy in a situation if your optic actually broke os somehow got knocked way out of kilter.
Of course if you have open sights also just rip the scope off and carry on, but this is a good little exercize to try sometime just to convince yourself it actually works. When I work with people and ask them to try it they are always amazed.