Our military uses lasers for range finding, as does other advanced nations.
As a result, you will notice that all of our lenses, sights, vision blocks, binoculars, etc have a semi-reflective film on them to prevent getting blinded by these lasers...although they really aren’t powerful enough to do that.
So what is holding us back from using more powerful lasers as weapons? If even one ISIS barbarian were to lose his sight due to our laser, the UN and various international bodies would accuse us of torture, and we’d have to start making disability payments to ISIS. IOW, we don’t have the stomach to use a weapon that can blind people.