Please do homework on your doctor and the lens they are using. I did do my homework on my doctor and waited months to see him. Unfortunately, he did not warn me about all the possible side effects. I ended up with positive dysphotopsia, which is constant flickering in the outside of my eye. It has been 11 weeks now and it never goes away unless I am in a very dimly lit room. Florescent lights are horrible. I have read a lot that the light is catching the edge of the lens and causing this because I have a "square edge" lens. I had no idea. I have a Vivity toric lens, which my doctor recommended as the best lens for me for distance and to help my astigmatism. I also have an irregular cornea because I had LASIK 27 years ago. Supposedly this goes away with time for most people, because your brain just has to adjust to the new lens, but no one know how much time. Some things I've read say 3-6 weeks, some say 3-6 months, some say a year. I'm headed to the Cleveland Clinic to see if I can get some help because I am only 57 years old and it has ruined my life. Doctors don't warn you that this can happen. If he had warned me, I would have never done it.