Yup. If he wants to save money, he can carpool to the doctor, but eye surgery is not the place to be searching for Groupons.
I had the exact same thoughts when my wife showed me the Groupon to Icon. After a bunch of research I ended up using them and have been very pleased. It's been 6 years I think and I have 20/15 and 20/20 now. I wouldn't jump on just any LASIK Groupon blindly though