I'm pert near brand new to wearing prescription eyeglasses and was just curious as to my options when riding my bike.  I would hate for a rock to bust my only pair of good glasses, but at the same time, if I take them off and wear my riding glasses(not prescription), I'm worried that it could be dangerous.

So I'm wondering what all my options are and what you guys/gals do if you wear prescription glasses...

I picked up a pair of prescription riding glasses from http://riderseye.com/prescription.html. Mine are bifocal. My street glasses are the blended doodads. My next riding glasses will be single vision. I saw Walmart sells prescription riding glasses as well. I needed them to seal out the wind. Once I installed the windshield, riding glasses aren't required to keep out the wind and it does deflect most road debris. I have ridden with a shield on my half helmet. That will protect your glasses and keep the wind out of your eyeballs. I do typically wear the riding glasses though since they are much more shatter resistant.

I would suggest riding with your glasses to see if you need to keep the wind off your eyes. Mine are very sensitive to the air flow. Even if you don't need them for that, I would suggest either a shield (half or full helmet) or riding glasses. I prefer the riding glasses.

I wear contacts, full face for me BUT, i have a backup pair of glasses i keep in my bag just in case i lose a lens that i got from here http://www.zennioptical.com/  for 6$

That's where they start, those aren't bulletproof of course, but if the worry is that you'll break your glasses riding, 6$ is no big loss. And you can customize a lot about them, of course the more you need the more it costs but that's true of anything.

I wear a streetfighter style lid (Lazer Dragon) which keeps the wind off the glasses. I've seem other crew with goggles like MX goggs that fit over the glasses too.
I have a pair of these http://barzoptics.com/arfa-surf-goggle-sunglasses for surfing but they're great for motorcycling, too. They come with a few different gaskets so you can use them in or out of water, and can get prescription lenses made for them. They're pricey but excellent.

I use safety glasses (provided by work insurance) and  a full face helmet.

Google: Over glass goggles

I ride with a full face helmet...occasionally with sunglasses.

Sometimes gnats will hit my chest, then bounce or get blown up inside my helmet.  About once every 500 miles....one of them ends up in my eye.  The bigger bugs don't tend to bounce like the gnats do.

I wear a FF helmet.  Remove glasses, put on helmet, put glasses back on is a little of a pain but not bad.  The helmet keeps all sorts of crap out of your eyes and off of your glasses that would otherwise hit your glasses or get in your eyes.

Modular, flip-up helmets don't make you remove your glasses to put them on.

Given that glasses, in many cases, cost as much or more than a helmet, why not protect them and your eyes at the same time?

You can get prescription safety glasses. They generally won't shatter but can still be broken or cracked. If it doesn't cost too much with your prescription, you might want to consider the self-darkening lenses.  I loved them when I had them. Now, with my prescription(I'm legally blind without my glasses), they want a small fortune for the photo-gray in them.