Hello,
She may have scratched or rubbed her eye some, but it most definitely looks like it is going to shed in that area. The color is off compared to the other side.
The bulging or appearance of swelling usually happens when they are going to shed, as water builds up under the skin when new scales are forming.
It's always good to keep the humidity levels under control also, no higher really than 40% on average.
I hope her respiratory issues goes away soon, too. Be sure to keep the tank around 80 overnight also, to help boost the immune system.
Tracie