Photorefractive Keratectomy (PRK)
Like LASIK, PRK uses an excimer laser to reshape the cornea and correct refractive errors. Where PRK differs to LASIK is that it is applied to the surface layers of the cornea, rather than the underlying bed of the cornea.
The epithelium, a layer of cells covering the cornea, is gently removed and the laser is applied to the exposed tissue. A ‘bandage’ contact lens is placed on the eye to help with comfort and the healing process for 3 to 4 days.
The effects of PRK are not instantaneous due to the ongoing healing process of the cornea. Improvement to eyesight is typically slower with PRK than with LASIK, however, PRK may be recommended instead of LASIK for people whose cornea is thinner.
As vision recovery is more gradual with PRK, Canberra Eye Laser recommends at least two weeks between the treatments of each eye.