Problems with contacts:
* When something gets in your eye, the contact generally complicates getting it back out. Often have to remove and rinse the contact. Can cause eye to be irritated for awhile. With glasses, you just blink it out like normal.
* Contacts can be easily lost or damaged. For this reason, I'd recommend disposables. However, then you run out every year and have to buy more.
* Putting them in and taking them out, as well as storing them while out, is far more complicated than just taking glasses on and off. You may have to put drops in your eyes to easily get them out, you need a contact case with fluid to store them in (if not throwing away), and when putting back in you have to make sure they are not inside out, plus some people need a mirror.
* On occasion, they may irritate your eye or eyes. Some people have more problems with this than others, and trying different brands can help.
* It you for some reason choose colored contacts, it will make you look like an alien from outerspace.
Problems with glasses:
* Constantly get smudged resulting in annoying blurs. I generally have to clean mine off several times a day.
* They fog up whenever there is a significant temperature change.
* Water drops that get on your glasses, from rain or other sources, are annoying.
* They can get funky after awhile, requiring more thorough cleaning.
* Can irritate nose and/or ears.
* Incomplete field of vision coverage.
Take your pick!