A good eyeglass shop should offer professional eye exams and prescription services. If customers wish to bypass the eye exam, they can bring their prescription with them or have their prescription determined from their existing pair of glasses.
It is highly recommended that international visitors purchase their eyeglasses at least a few days before their departure from Korea so that any needed adjustments may be made before they leave. As many international visitors attest, repair/maintenance services can be difficult to obtain overseas. Optical services in Korea include free fittings, a glasses cleaning cloth, and a glasses case, all free with purchase.