Let us know how it goes! Poor fellow, but really don't see any other way of clearing his vision....it's not like he can wash the hairspray out and comb it back like Mike Score.
You mentioned above that the rest of the flock was kind of mean to him. That may well be a combination of his newness and his affected vision, but once you dub him, you'll likely need to keep him separate from the flock for a bit while it heals. Chickens LOVE to peck other chickens' wounds (to death, if they get a chance). So either keep him in an adequately sized crate in the coop/run/wherever the flock normally is so that they can still be together, but he can easily stay away from aggressive pecking until his comb heals up pretty good (which shouldn't take long).
You mentioned above that the rest of the flock was kind of mean to him. That may well be a combination of his newness and his affected vision, but once you dub him, you'll likely need to keep him separate from the flock for a bit while it heals. Chickens LOVE to peck other chickens' wounds (to death, if they get a chance). So either keep him in an adequately sized crate in the coop/run/wherever the flock normally is so that they can still be together, but he can easily stay away from aggressive pecking until his comb heals up pretty good (which shouldn't take long).