This is inflammation of the eyelids and the conjunctival membranes that border the eyelids. The eyelids and the borders of the eyelids swell under these situations, giving the cat the appearance of squinting.
This is the inflammation of the eyelids along with conjunctival membranes. When this happens, the margins of the eyelids and the eyelid itself swell, and it seems like the cat is squinting, leading to excessive tearing.
Glaucoma results from the pressure in the eye, which is full of excess fluid. If your cat is experiencing glaucoma, you'll notice she shows signs of severe pain, such as squinting one eye, rubbing it, crying, yowling, and avoiding people.
Several things can cause eye infections, such as parasites, fungi, bacteria, viral infections, etc. If you see your cat squinting and rubbing its eyes, that might be the first sign that your cat has an eye infection.
Corneal ulcer manifests in open sores on the eye’s surface. You will notice the cloudiness in the cat's affected eye, squinting and rubbing, eye pain, discharge, and redness.
Eye irritation in cats can occur due to eye irritants such as cleaning chemicals, perfume, dust, and tobacco smoke. You can notice your cat squinting one eye or rubbing the affected area, and the affected eye may be red and release discharge.
Your cat squinting one eye is often the result of some trauma. Besides the squinting, the cat’s eye may release some discharge from the eye, which can seem like tears, transparent, thick, or green-yellow.