severe cases severe damage commonly prescribed cases medications systemic diseases supportive care cats behavior environmental irritants eye irritation prescribed afterward infections trauma prevent complications fluids warmth involves avoiding allergic reactions small particles cornea cloudy clear surface open sore corneal ulcer middle layer uveal tract pain management corneal ulcers front part thin tissue eye behavior eye cloudy dry eye eye cloudiness prescribed symptoms allergies antihistamines visible damage symptoms persist relieve symptoms dust dirt tears leading antiviral medications green squinting eye infections eye discharge foreign body eye drops bacterial infections feline herpesvirus viral infections cats eye infections cats eye leading dust symptoms redness environmental irritants common surgery bacterial infections prevent infection allergies swollen cornea change eye infection inside worsen early treatment bacterial antibiotics topical inflammation common allergens irritation lubricating drops feline leukemia virus recurrent eye infections feline herpesvirus allergies additional treatments uveitis common viral infection lubricating eye drops corticosteroid eye drops treat bacterial infections prescribed steroidsantiinflammatory drugs visible debris treatment viral infections antivirals viral antiviral treatments pupil frequent blinking stringy discharge squinting developing eye issues eye surgical procedures recommend eye cleaning pollen dust mold secondary infections due scratches foreign bodies injury foreign bodies stray camps discount services free antirabies damp soft cloth stimulate tear production require specific treatments