I'ma go waaaaaaaay out on a limb & guess that there's a whole lot to this story that we're not hearing. Probably the other kids fuck with the blind kid simply because they get a reaction from him. Probably the blind kid has anger management issues & behavior issues (over-protective mommy anyone?) and in all honesty shouldn't be enrolled in a public school that isn't equipped/trained to handle all his needs & issues.
I've met the kid and my wife knows the mom. I thought that would make me cool I don't have anything useful to add.
DSL go buy him a cane to replain the school bought one and have him return the school provided pool noodle.