Damsel got stung by anemone will it survive?

My damsel got stung in the eye with my anemones tentacle I know that you should only put anemonefish (clownfish) in with anemones but superpets had it with a tank full of anemones I thought it already knew not to get close to it. Well it got stung last night I think I should buy a night light so there not completely in the dark so this doesn't happen again? I know I did a bad judgement call on this one the damsel just hides under the rocks not swimming as much plz help