I recommend the friendly Ansan Seoul Eye Clinic.

We recommend Seoul Eye Clinic located in Gojan-dong, Ansan. It is a specialized hospital for all kinds of eye surgeries, including cataract surgery, LASIK, LASEK, lens implantation, presbyopia surgery, and Dream Lens. The clinic has two ophthalmologists and friendly staff. It operates from 9:30 AM to 7:00 PM. If your family members need to visit an eye clinic, going there for a consultation usually results in quick recovery.