it doesn't take long to get used to them. i don't wear them everyday, i pick the time i want to wear them. always if i go out, and sometimes to work, if i am just hanging around or shopping i don't wear them. they are really safe, although i wouldn't wear them for more than 12 hours a day and you need to work up to that. i have been wearing them for about 12 years they are allot better than they used to be, they are really comfortable you don't even know you have them on, by the end of the day though they your eyes can get a bit tired, more than usual, but you see better with contacts than with glasses. in the 12 years i have worn them my glasses prescription hasn't changed. they usually only get worse for a few years and then they stay at the same level. how often are your glasses changed anyway. if you can go 2 years with the same prescription you should be ok. they don't make your eyesight worse.