Which procedure involves removing tissue from the corneal surface to reshape it using a laser?

Which procedure involves removing tissue from the corneal surface to reshape it using a laser?

• A. Photorefractive Keratotomy
• B. LASIK
• C. Pneumatic Retinopexy
• D. Laser Photocoagulation

Answer: (A)

Photorefractive keratotomy involves removing tissue from the corneal surface with a laser to reshape the cornea. In this surface ablation, the outer epithelial layer is removed and the underlying corneal stroma is then sculpted by an excimer laser to change the cornea’s curvature, which corrects refractive errors like myopia or astigmatism. Unlike LASIK, which creates a corneal flap and then ablates tissue beneath it, this procedure targets surface tissue directly. The other options are retinal procedures: one treats retinal detachments and the other coagulates retinal tissue, not reshaping the cornea.

Photorefractive keratotomy involves removing tissue from the corneal surface with a laser to reshape the cornea. In this surface ablation, the outer epithelial layer is removed and the underlying corneal stroma is then sculpted by an excimer laser to change the cornea’s curvature, which corrects refractive errors like myopia or astigmatism. Unlike LASIK, which creates a corneal flap and then ablates tissue beneath it, this procedure targets surface tissue directly. The other options are retinal procedures: one treats retinal detachments and the other coagulates retinal tissue, not reshaping the cornea.