i just got glasses 3 days ago im still getting use to them the optometrist said i need them full time for reading, computer, driving all distance stuff even tho i have a low prescription of myopia with astigmatism i can still see with out my glasses every isn't blurry with out them. well now it is because i have been wearing all the time since i got them so its hard to c when not wearing them. but do i need to where them all the time. and why do i get headaches fter i stop wearing them for like 15 mins or so is that norm cause my eyes are deending on the glasses?