The blindness from a flash camera is just temporary and will not usually damage your eyes if you only get flashed with the camera a couple of times.
But if you're constantly being flashed in the eyes with a camera then it could potentially blind you but actors and singers are flashed with cameras very often and they're okay and not blind as a result.
Too much exposure to bright lights can eventually damage your eyes and cause your vision to get worse so avoid getting flashed with a camera too much.
But the occasional flash from a camera will just cause temporary blindness that will go away within a few minutes or so.