Medical issue. I'm OD -6.25 +2.25 Axis 3 / OS -6.75 +2.50 Axis 5 and +1.75 NV OD and OS. That's optometrist-speak for 'really, really, blind' and with severe astigmatism in both eyes as well. Yes, they make contacts for astigmatism now. No, I am not a candidate. Been through all this with my ophthalmologist, who's an MD. He knows the contact lens makers like to say they can address this, he disagrees and so do I. So glasses for me and to be quite honest, I have no desire to shove things into my eyeballs.
It can suck training in contacts.
Both of my eyes are soignoficantly astigmatic. I have worn the old-style gas permeable lenses since high school and they do a fine job for dayly stuff...but to be honest...I hate waring them for martial arts. One smack around the eyes (even accidental) and it stings like a *****. I have worn my cheapo shooting glasses training before to protect my lenses...to be honest I have found the glasses to just be easier.
I like the goggles Gordon has...I may try to find similar ones this summer when I see the doc again.
Another idea...I know of at least one online optical that will retrofit old frames with new lenses. That can also be a way to save some coin, if that is an option. I'll have the links for you in a few.