My rats eye had blood in it

[Derpthedoc]

I noticed that my rats eye had blood in it and was squinting it has since returned to normal and she is acting perfectly fine I have. A vet appointment but I’m afraid since the problem is no longer there there’s not much they can do any idea what could have happened
Ps apology’s if I posted this in a wrong place

 

[Henishry]

Any updates on her?