How LASIK is different from PRK?

I'm a researcher. Last year my research was on cancer and its various treatments. This year I'm focusing on the different types of treatment for eye care. I have read about LASIK from a blog which helps the people who are troubled with nearsightedness, farsightedness and astigmatism. I have read that there would be problems like flap complications, dry eyes and temporary discomfort and visual disturbances. Does anyone over her has undergone such situations? What was your LASIK eye surgery experiences ( )? How is LASIK different from PRK?

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