They make little straps to keep your glasses on for sports I think. Also there might be an anti-fog spray for them too. Fogging would be my main concern for suiting.
You can easily find these things online or at your local stores. :3

My two suggestions:

Put anti-fog on them, like professional swimmers put on their goggles and scuba divers use on their goggles.

A little late for this one, but Get a suit head from someone that has made suits for glasses wearers in the past. Glasses add dimension to your face, and a 'regular' suit head will pinch and crush your glasses. Alternatively, you might be able to carve out the foam on the inside of your head to add room for your glasses, but I would be careful with that. Different suitmakers use different methods to keep the suit head on your face. I know Artslave, for example, uses a method that puts more pressure on the sides of your head, and some, my own included, rely a bit more on your forehead and nose. If your suit RELIES on your nose and forehead, carving for your glasses would just make the suit head 'droop'.

Anti-fog spray seems to be a very popular suggestion, so I'll definitely do that!
My maker knows I wear glasses & assured me it will be roomy enough for them inside. She's had customers that wear glasses in the past!
Thank you so much though, this all helps a ton!

I wear glasses in my suit and they fog like crazy. It's ok if it's cold in the room, but more than often it's not.

I just trained myself to breathe out of my mouth( my mouth lines up with the mouth of my suit.) rather than my nose. Doing that drastically lessens the fogging. Sometimes, if it's a short outing, I go without my glasses. It's blurry as fuck, but I can still make out ok.

I also heard Rain-X works, but never tried it.

That makes sense!! I'll work on breathing through my mouth. XD

I'm not sure how feasible it will be for you at AC, but i've heard that having more than one fan inside your head helps.

basically, you set it up so that one fan blows air into the head, and another (usually on the top/hidden by the ears or located in ear vents) blows air out. i don't typically wear my glasses in suit, but when i do, i don't have a problem with them fogging up.

I've heard you can get away with only one fan inside the head, pointing out through the mouth (theoretically, fresh air is drawn in through the eyes), but i've never had any luck with that. granted, at the time, i was using the strategy for cooling, rather than de-fogging.

hope that helps! :3

I remember last year they had a stand in the Dealer's Den that installed fans for you pretty cheap! I think it was like $20 or somethin.

Thank you so much!

oh wow! that's awesome!

even if it doesn't end up working for defogging, man, fans are life-savers! :3

I second the anti-fog spray & getting a head strap (like this one). I use anti-fog spray for my snowboarding goggles. Works a treat!

The main thing is that you specified you needed the extra space in the head when you commissioned the suit!

Def gonna get those two things - they're a popular suggestion & seem to be what I need!
My maker knows I wear glasses & assured me it will be roomy enough for them inside. She's had customers that wear glasses in the past!
Thank you so much, helps a bunch!!

Fingers crossed they do the trick for you! It's a shame about the contacts, I find them really useful for sports and fursuiting.
Ah, brilliant! That's the main thing. =3 One of my heads is really fitting, so makes my glasses cut into my face. x3x Not a pleasant experience.

Thank you!! And yeah, I've tried contacts since I was 13 years old. None of them have ever worked, and they always end up cutting up my eyes or something like that. x_x My one eye doctor said my eyes just "reject" contacts and it would be best to just not use them >n<
Oh gosh I think even if my head is a bit snug they won't cut into my face!! D: They're a very soft matte plastic material, these glasses!! They don't have any sharp edges or corners. x3 But still it would be uncomfy if they were pressing into my face. X.X

That's okay! Aaah, I know what you mean, I have astigmatism in my right eye, so the lens is a funny shape. I only realised I had it when my contact kept popping out of my right eye. >.<" I couldn't afford astigmatism contact lenses so that was that for me. ;n; Fortunately, it's cleared up now. Really odd.

Yeah! I have horrible astigmatism in both eyes, I've tried specialty contacts for that before & no dice. They would dry up and just ughhh so uncomfortable... I've literally tried everything until my eye doctor was just like yeah let's just stop. DX My astigmatism has only gotten worse over the years, so has my eyesight.. They said it won't regulate until I'm in my 30's ;A;

Christ. x.x Hopefully it'll be before your 30's bless you. ;u; I know how you feel though, when it affected me I just gave up with contacts entirely.

If all else fails-- You could always just have a friend make sure you don't walk into things while your fursuit head is on. xD

I'm p. much legally blind without my glasses too-- So I'm glad someone asked about this!

It would make me wayyyy too anxious ;o; Having such poor sight I freak out when I don't have my glasses on!! >n<

Understandable!

Mine will fog but only after quite a long time (when I've sweated quite a bit). I usually take that as a sign to take a break anyways since it's probably time for water. If you can't get anti-fog spray, I also wanted to suggest maybe shaving cream instead? I don't have a problem with my glasses staying on but I do get quite a bad headache after a few hours. In which case, I'd recommend shaving a bit of the foam where the glasses rest behind your ears if you need to. Anyways, there should be fans with tubes (like flexible air duct hose) laying around. Those are great for holding right on your face and sticking your arms down in case you start to fog up. (:

Oh that's a great idea!! I'll need to look into fans. I know last year at Anthrocon they had a stand in the Dealer's Den where they would install fans into your fursuit head for pretty cheap. I might do that this year!!
Thanks a ton, this helps a lot!!

Er, I mean...these are laying around, probably in the fursuit lounge. Should have made that more clear. xD They look like little boxes with air duct hose coming out of them. (Really hard to explain because they're so weird. xD) I don't know a thing about fans in the actual heads themselves but I think you will have a fun time regardless of what happens!

OOOOH I see!! Good to know, thank you!!! >U<

More or less everything said here is pretty true!

I wear glasses, but I use contacts most of the time so I tend to not have the glasses issue in suit, but the few times I have tried it, I had fogging issues and also it was hard for me to fit them inside my head. Anti fog should fix that first issue right up, and working with your suit maker on allowing a little extra space inside the head should help accommodate the size of your glasses.

Also, since it'll be your first time suiting, I waned to give you a heads up and say make sure you drink lots of water and don't overdo it the first few times you wear the suit! It gets hot inside those costumes, and making sure you're hydrated is a VERY important part of suiting. My EX went for four hours the first time he suited and nearly had to go to the hospital because he dehydrated and overheated himself. Take it in short periods of time the first few times you wear it, try to limit it to about 1-2 hours per outing to keep you feeling good! It's exhausting to wear those suits and you don't want to make yourself sick or tire out too much!

I know I sound like a concerned mom, but I'm just passing on some advice from personal experience XD I know I had to learn alot of these things on my own and it didn't always end well for me :x Also, if the suit seems unbearable for the first few times you wear it, don't fret! I used to think I wasn't cut out for suiting because it was too tough for me at first, but blondefoxy told me that it's a matter of getting used to it. The more you wear your suit, the less trouble it will be over time!

Awesome!! My maker did say there will be extra room for glasses so that should be fine.
And yeah, I've been told by lots of others the water thing!! I intend to drink plenty. However the breaking it up into few hour sessions I didn't hear yet so that's a great idea and very helpful!! I definitely do not want dehydration or heat stroke. D: My bf will be my handler so I know he won't let me go without drinking for too long!!
You don't sound like a concerned mom at all, all your advice & stuff is amazingly helpful. ;u; Thank you so so much!!

You might even think about getting a pair of really inexpensive glasses online, from a place like http://www.39dollarglasses.com/, just for fursuit wear.

Look for a pair that's smaller and lower-profile than your regular pair -- or just get frames so cheap and lightweight that you could pop out the lenses to mount in your suit directly! (Be advised that your suit eyes would have to be VERY close to your face to get the right focal length._

Getting a spare pair is a good idea, however my prescription is so so insane idk if it would even be affordable, & right now with time constraints I need stuff I can pick up at stores. ;;
But thank you!! Those are good ideas!!

Things aren't always so easy as it seems! D:
They should make these specially made designed glasses that can be worn on the outside of the suit or built-in to the eye pieces. I'm sure there's probably a way to do that glasses users who need them. :o

yeah for real ;c

Get the skull cap or at least wear a bandana . It will help keep sweat out of your eyes which will impede vision. AC can get pretty hot.

I have the skull cap already!! So that will be good. UvU I'm going to the sport's store today to get a strap for my glasses & anti-fog spray!!

Cool. Yeah my glasses were foggin' up for a bit this past weekend at a furbowl meet. Sooo I bet these precautions are probably going to save you a bit of discomfort in the long run.

I don't have my own, but I have wore two different heads before (borrowing). I have glasses too. Once the head is on (glasses off) I managed to slip my glasses into the mouth and onto my head. One head was a little too snug, but the other worked out well! The key is having some space in the front and good eyes.

They won't slide off. Also they won't fog- your breath normally exits the mouth of the fursuit.
What you have to worry about is space.

Oh! And don't forget to take your glasses off first when taking off your head. THAT HURTS D: