How can you tell if you have a blind baby?
I have 2 that are 5 weeks OOP one runs all over the place and the other one sits there like it is afriad to move.
she holds her head up like she is sniffing the air and doing the Ray Charles thing.
When she does move its like she is feeling her way.
She doesn't notice my hand comming to get her.

They have a vet appointment next week
But I wondering if there were any way to tell now.

This works with dogs, not sure about gliders. Bat your hand at her face, don't actually smack her though. See if she blinks. Just make sure not to come close enough that she can feel you with her whiskers. Most critters will blink when you do this. You can also try shining a flashight in her eyes, she should close or squint her eyes. You might also be able to see if her pupils dialate when you shine the light in her eyes, which they would in a sighted animal. Kinda hard to see glider pupils but with the light you may be able to see them. If she responds to the flashlight there's still a posibility that she is partly blind but can still see light so the trick with the treat should work well to determine that. If she can reach out and grab it in the first try I'd say she can see pretty well.