LASIK may exacerbate pre-existing dry eye symptoms more than PRK.

“i think there is a little bit more dry eye issue with lasik compared to prk as well because when you create that flap the way tearing works is that a signal from the front of the eye goes to the lacrimal gland which then secretes tears if you create a flap you temporarily sever some of the nerves that are sending the signal and eventually over time those nerves typically regrow back and you re-establish that feedback mechanism but i think you get more dry eye with lasik than with prk”