# Why One Squinting Eye in Cats Is Never Worth Ignoring
A cat squinting in one eye signals a health problem that demands immediate veterinary attention. Veterinarians stress that squinting differs from blinking and represents a clear sign of pain or irritation in the affected eye.
Common causes include corneal ulcers, scratches to the eye surface, foreign objects lodged behind the eyelid, and infections. Cats with feline herpesvirus often develop eye problems that result in squinting and discharge. Uveitis, inflammation inside the eye, also produces this symptom and can lead to blindness if left untreated.
The third eyelid may become visible alongside squinting. Excessive tearing, redness, and discharge accompany many eye conditions. Some cats avoid bright light when experiencing eye discomfort.
Waiting worsens the outcome. Untreated corneal ulcers progress rapidly and can perforate, causing permanent vision loss. Infections spread and damage deeper eye structures.
Pet owners should contact their veterinarian as soon as they notice one-sided squinting. Early diagnosis prevents complications. Veterinarians examine the eye with specialized equipment and prescribe appropriate treatment, which may include antibiotics, antivirals, or pain medication depending on the diagnosis.
Never delay seeking care for eye symptoms in cats. The eye's delicate structures deteriorate quickly without proper treatment.