1) Unlike buying eyeglasses online. Buying contact lenses does not come with the worry that they will look funny when you get them!
2) You can change your eye color. I always wondered what I would look like with blue eyes and I had a few friends who went with purple!
3) You can dress up for Halloween. Do you want cat eyes? Contacts can do that!
4) You can save money by purchasing discount contact lenses online from a retailer like BuyMoreContacts.com
5) You can purchase from a company that specializes in contacts so you can review all of your options in one location. Plus, they usually have tutorials and pages that help explain all of your options.
6) They are shipped to your house when you need them.