I had ICLs implanted in 1997, I'm severely myopic, -22 diopters in each eye and my VA still 20/200 without glasses now since the operation. I also had the swelling in one eye because of the procedure but fortunately I was rushed back to hospital (OMG the pain of eye swelling.. ech!) but everything is OK now so far about 17 years later, mostly except that I'm developing cataracts (I'm 34 now) and have to get that treated but as a severely myopic person I'm at a high risk for retinal detachments, whee! WE MAY HAVE TO PUT A BAND AROUND YOUR EYEBALL!
I have a ton of other eye issues - extremely crap contrast sensitivity, bad photophobia, non-degenerative macular dystrophy, astigmatism and bilateral amblyopia. And just for kicks some neurological visual issues thrown in for more fun!
Can't use a black on white GUI at all, and if I turn the brightness down then there's not enough light to see it so I have Windows 8 (or whatever O/S I'm using) set to some form of white on black/dark grey and then I can sit with the screen on max brightness for hours on end without any issues. (So please, any developers reading this, PLEEEASE follow the colour scheme set by the operating system/user choice or allow custom colours, some of us really battle to function). The stock Gmail app on Android, for example is barely visible to me and after about 5 mins I feel literally sick.
My verdict is: If you're coping with glasses, don't be too eager to get any procedure done. There are always risks and no matter how small the chance of failure is, it's not something want to lose, I don't really regret my ICL operation simply because my glasses were HUUUGE and HEAVY and cause headaches, face pain, so work out the pros/cons.