Besides LASIK, there is another popular eye surgery which also performs well in vision correction. That is the Photorefractive Keratectomy laser eye surgery, abbreviated as PRK. It bears a 12 years' history, and it has been proven to be a rather safe and efficient procedure. Up to now, there is no report concerning harms originated from PRK. However, with the application of LASIK, PRK gradually is used less.
Patients with thin cornea or a large pupil are good candidates for such a surgery. To start a PRK procedure, some preparations have been done so as to guarantee the success of PRK. A metal ring and anesthetic drops will be applied before the surgery to respectively clean the eye area and eyelid and to ensure that the eyes are numb. Unlike other surgeries that correct vision by reshaping the corneal shape, PRK achieves it by removing thin layer of cells on the cornea. A laser examiner is the main tool to help surgeon accomplish the procedure. The epithelium tends to naturally grow back, so there is nothing to worry about it.
Compared with those newly emerged eye surgeries, PRK requires a longer time for the patients to get recovered. Usually, two months is needed and the patients will experience blurred vision and hazy. Discomfort and pain are possible as well. Complete recover needs about a few months. Possible risks include dry eyes and poorer night vision. Dry eyes is a common after effect as for any eye surgeries, for the the tear production system is affected during the procedure. The doctors would advise patients to use eye drops to keep eyes moist, so that they would stay away from infections. Poorer night vision is a specific complications after PRK. Several months, the patients are able to see clearly in the daytime, and they are supposed to carry out their daily routine lift without the assistance of contact lenses and glasses. However, their night vision has not recovered totally, and maybe it appears poorer than that existed before surgery. They would experience halo or glare around lights. Therefore, people who had ever had PRK are not suggested to drive at night, in case of any car accidents.
There are both merits and demerits concerning PRK laser eye surgery. With comprehensive consideration according to the information given above, you would decide whether you would accept PRK to get rid of contact lenses and eyeglasses.
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An introduction of PRK procedure
Some aspects of LASIK and PRK
Patients with thin cornea or a large pupil are good candidates for such a surgery. To start a PRK procedure, some preparations have been done so as to guarantee the success of PRK. A metal ring and anesthetic drops will be applied before the surgery to respectively clean the eye area and eyelid and to ensure that the eyes are numb. Unlike other surgeries that correct vision by reshaping the corneal shape, PRK achieves it by removing thin layer of cells on the cornea. A laser examiner is the main tool to help surgeon accomplish the procedure. The epithelium tends to naturally grow back, so there is nothing to worry about it.
Compared with those newly emerged eye surgeries, PRK requires a longer time for the patients to get recovered. Usually, two months is needed and the patients will experience blurred vision and hazy. Discomfort and pain are possible as well. Complete recover needs about a few months. Possible risks include dry eyes and poorer night vision. Dry eyes is a common after effect as for any eye surgeries, for the the tear production system is affected during the procedure. The doctors would advise patients to use eye drops to keep eyes moist, so that they would stay away from infections. Poorer night vision is a specific complications after PRK. Several months, the patients are able to see clearly in the daytime, and they are supposed to carry out their daily routine lift without the assistance of contact lenses and glasses. However, their night vision has not recovered totally, and maybe it appears poorer than that existed before surgery. They would experience halo or glare around lights. Therefore, people who had ever had PRK are not suggested to drive at night, in case of any car accidents.
There are both merits and demerits concerning PRK laser eye surgery. With comprehensive consideration according to the information given above, you would decide whether you would accept PRK to get rid of contact lenses and eyeglasses.
Related articles
An introduction of PRK procedure
Some aspects of LASIK and PRK
An Overlook Of Prk Laser Eye Surgery