the optician told you, e.g. the man you buy your glasses off or spend a fortune on contacts every year. Get some advice from your gp, i think they'll tell you that it has a very good safety and success record. Ask to have an appointment with the optician at the clinic who would carry out the procedure, make sure it will be them that takes care of you on the day, ask how many time they have done it or if they have ever experienced any problems and how these were over come, remeber to get details on what your vision will be like in the week after the operation as this can affect your work / life. I think you'll find that the experience is a lot easier than the build up to the operation - i had mine done 6 years ago now and i can without a doubt say that it was the best thing i have ever bought myself.