Excimer Laser Keratectomy, also known as photorefractive keratectomy (PRK), is a surgical procedure used to correct various vision problems, primarily myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. It is a type of refractive surgery that reshapes the cornea, the clear front portion of the eye, to improve visual acuity.
During the procedure, an excimer laser is utilized to remove a precise amount of corneal tissue to reshape it and alter its curvature. By reshaping the cornea, the laser helps to correct the refractive errors causing vision problems. Excimer lasers operate at ultraviolet wavelengths and emit short, precise, high-energy pulses that can ablate the corneal tissue with minimal heat damage, making it a safe and effective procedure.
Excimer Laser Keratectomy involves several steps. First, the cornea's surface is prepared by removing the corneal epithelium, the outermost layer of the cornea, either mechanically or using an alcohol solution. Then, the excimer laser is directed onto the underlying corneal tissue, precisely ablating it according to a predetermined pattern and the individual's specific refractive error. Finally, a bandage contact lens is placed over the eye to protect the cornea during the initial healing process.
The recovery period for Excimer Laser Keratectomy varies, but most patients experience some discomfort and temporary visual disturbances, such as blurred or hazy vision, initially. However, as the cornea heals, these side effects usually subside, leading to improved vision over time.
Overall, Excimer Laser Keratectomy is a widely used procedure that offers individuals with refractive errors an opportunity to greatly reduce or eliminate
