Excimer lasers are used, for example, in: Ophthalmology -- to vaporize part of the surface layer of the cornea and thus reshape the cornea to correct refractive errors from myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. Dermatology -- to treat psoriasis and vitiligo.

Why is excimer laser used in LASIK?

Excimer lasers were developed in the 1980s and give eye surgeons focused ability to remove minute amounts of corneal tissue. The excimer laser in a LASIK procedure creates UV light that is absorbed by tissue,rather than burning or cutting through.

What procedure uses an excimer laser?

LASIK uses an excimer laser (an ultraviolet laser) to remove a thin layer of corneal tissue. This gives the cornea a new shape so that light rays are focused clearly on the retina. LASIK causes the cornea to be thinner. LASIK is an outpatient surgical procedure.