Hello,
Eyes are one of those things that absolutely have to be seen in person to assess. In some cases I need to stain the eye to look for corneal damage. In others I had to take ocular pressure. And in some we just try an ophthalmology antibiotic and an ecollar. For allergy cases I might send home an eye flush. But they are all based on the in person exam.
See your vet as soon as you can and do not let your cat run her eyes. That can cause major cornea damage.
Hello,
It could be a uti, cystitis or your cat being blocked (ie urinary bladder blockage), which is a medical emergency. Please go to the vet immediately.
Best of luck. Please keep us posted.