Both contacts and glasses.
I had glasses when I was around 10 and wore them 'til I was about 14. Then I only wore contacts from age 14-28, and didn't even own a pair of glasses, although my friends always said it was HORRIBLE to wear contacts as much as I did. My optometrist always said my eyes were strong though.
Then I got an eye infection and was forced to get glasses for a month, and I vowed that as soon as I could go back to contacts, I would throw these glasses in a drawer and never use them again. But then I realized how great glasses are for lazy people like myself, and people said they really suited me... so here I am, wearing glasses all the time.
I still wear contacts if I am going to play poker, or anything social, as someone else mentioned. But if I'm having a lazy day at home, or just going to work, I don't bother with contacts anymore.