Lasers travel in one direction, light travels in many directions, light can be focused into a bright point that could blind you, by using mirrors to focus it all, or cutting the rest of the light off and letting a few go through. Indeed, consentrated light could probably do the same amount of damage as lasers, but that's not my point! My point is... I foget, oh wait, my point is that lasers are differant to light and shields might be able to stop them.
People don't even know that a shield could exist yet!! They can make an iron dome that can stop a whole lot of things, but it's not see through, shields are fictional, all i know is that a magnet can deflect another magnet away if you push them together properly and that might be the technology you could use to stop ferous materials.
Also, shields might stop things of high matter, light is very low matter and would go through, lasers are extremely focused and probably have a lot higher matter
light || -> (
laser *|| (