I had to start wearing them for nearsightedness in 4th grade and later in about 8th grade I started wearing contacts. I've worn contacts ever since. They dont bother me and over the years you get used to doing everything in them, swimming, etc......
My son has had to wear them since he was 3 months old. He is now a bit over a year and a half old. He is severely farsighted. He will more than likely have to wear glasses or contacts for life. My daughters vision is good so far, hopefully she dont have to get them later in school like I did.