It's worth mentioning that a single drop of Alphagan (brimonidine) in each eye an hour before dark will often eliminate halos in people who've had Lasik. The ef

It's worth mentioning that a single drop of Alphagan (brimonidine) in each eye an hour before dark will often eliminate halos in people who've had Lasik. The effect lasts an entire night and there aren't any real dangers in the way of side effects or interactions.