no you are not required to buy glasses.

as for contacts, I buy whatever will give me the most number of contacts for the cheapest amount of money. basically there is no difference between the daily wear, weekly wear, or monthly wears. So usually I buy the daily wear and just clean them and wear them for 2-4weeks.

Well that's what I used to do, now I wear my glasses 95% of the time. the other 5% I wear my contacts, because wearing glasses under helmets suck ass.