Hi there and
to the forums!
I agree that she looks to be in very poor shape and it's essential to get her to the vet right away so that the infection or disease does not cause damage to her vision permanently.
An avian vet is the only person who can accurately evaluate or treat your little one; although we can offer some home remedies to soothe her eye, these are not
cures and will not help her get better, only alleviate the discomfort she is surely feeling.
It's important to try and schedule her in for an appointment right away to ensure that she is on the road to recovery soon! If you are unable to find saline drops, you can also make some chamomile tea (pure chamomile, no sweetener) and cool it to room temperature before gently dripping some into her eyes with a cotton ball. Again, this will not cure her, only help her feel better while you wait to get her an appointment.
Please be sure to update us on her condition very soon! I hope she's able to feel better
Meanwhile, be sure to read through the links provided by FaeryBee as there is lots of valuable information among them to help you stay updated on the very best of budgie care practices! If you have any questions after reading through everything, please ask as we'd love to help.