Red, swollen, tearing eyes with discharge, and occasional sneezing; at first one eye would not open, now the other also tears a bit and is slightly red.

A cat with red, swollen, tearing eyes and sneezing is very likely infected with feline rhinotracheitis. If symptoms are severe, go to a vet, because home treatment carries high risk and improper care can cause blindness or death. If a vet visit is inconvenient, consider amoxicillin-clavulanate, ampicillin, and famciclovir with lysine tablets to boost antiviral ability. In addition, for the eye symptoms, use ganciclovir and hydrocortisone acetate eye drops alternately, and clean the eye discharge promptly.