According to a recent study on patients, who have undergone LASIK and PRK procedures about 10 years ago for correcting nearsightedness has disclosed that both the procedures are proven to be safe and effective. LASIK is a procedure to reshape cornea by using laser, but with no direct work on the outer surface of the cornea, where as PRK procedure works directly on the cornea, using a laser.

Study Findings
a. Both the procedures have effectively corrected the nearsightedness (myopia) in the patients and the results are long-term.
b. There are no long-term complications in the patients of both the procedures.
c. These surgeries have effectively improved the vision even in those who are highly nearsighted.
d. The study has shown that a patient of PRK procedure maintained near-normal vision (-0.88 D) from a severely myopic pre-PRK measurement (-7.45 D).
e. An average LASIK patient maintained near-normal vision (-0.66 D) from a preoperative diopter measurement of ( -8.7 D).