My mothers dog is a 7 year old mix, she recently got a bluish film over her right eye? can you tell me what this is, and is it serious? She dosent seem to be in any pain or uncomfortable in any way?

It can be keratitis, glaucoma, uveitis, or cataracta, and yes it can be serious. If she's not in pain now it's good but pain may come soon if nothing is done. Please take her to a vet as soon as possible. Eyes are not something to mess with, especially in an older dog.

I second Raphael's words. Your dog needs to be examined by a veterinarian so he can make a diagnosis. It's impossible to tell what the problem is when we don't even see the dog.