In the last episode of Star Wars Rebels, Rex had to disguise himself as a stormtrooper. When their cover was blown, Kanaan and Rex had to fight out if a star destroyer. During the firefight, Rex missed a few shots and Kanaan comments on how he "shoots like a storm trooper." Rex threw a tantrum, removing his helmet and heaving it at the attacking stormtroopers and blasting two or three of them, saying something along the lines of
"it's these dang helmets."
If you look at the images, you will see an evolution. Clones had larger HUDS and could see more of the surrounding environment. Stormtroopers look like they will have crappy peripheral vision. New order troopers seem to have improved helmets to change this.
My question: other than this scene, is there any in universe proof that stormtrooper armor, helmets in particular, are less effective at displaying visual information to the trooper?