Changes that may be seen include edema of the optic nerve and retina, thinning of the blood vessels at the back of the eye, and other, more advanced changes noticeable in longer standing (chronic) cases.Ī detailed ophthalmic examination of both eyes will be carried out, as glaucoma is often seen in both eyes even if only one is obviously affected. Your veterinarian will check your cat over carefully, noting any physical evidence of illness, ruling out other causes of the clinical signs that are being shown.Īs well as the changes noted above, your veterinarian will use an ophthalmoscope to examine the back of the eye under illuminated magnification. This history will help to differentiate the specific cause of glaucoma in your pet. Your vet will discuss every aspect of your cat’s life and health care, as part of general good veterinary medicine. If your DVM veterinarian suspects that your cat may have glaucoma, an immediate referral to a veterinary ophthalmologist may be suggested. Abnormalities of the iris such as feline iris melanosis.Hyphema (bleeding into the eye) can be caused by coagulation defects or trauma.Uveitis – inflammatory conditions of the uveal tract ( the soft tissues lining the inside of the eye including the iris).Primary glaucoma “just happens”, while the most common causes of secondary glaucoma are: If both eyes are affected, the owner may notice blindness, but if only one eye is affected, vision loss may not be obvious. Episcleral injection (reddening of the white of the eye).Enlargement of the eyeball (this can be difficult to assess). Edema of the cornea (a bluish white color of the front of the eye).Ocular discharge (tears spilling down the face).Obvious discomfort in the eyes ( glaucoma is a painful condition).Blepharospasm (spasm of the eyelids i.e.Glaucoma in cats may cause a number of symptoms, with one of the most apparent being edema of the cornea, which is a bluish-white color in front of the eye. Secondary glaucoma the more common type of glaucoma, and it can be caused by a number of primary factors (see below). This is more likely to happen in purebred cats like or Burmese, Persian, or Siamese cats. When this type of abnormality is present, it is likely to affect both eyes. Primary glaucoma is rare in cats, and when it happens, it is usually due to inherited anatomical abnormalities of the eye, such as abnormal drainage apparatus preventing normal outflow of fluid. some other illness results in the cat developing glaucoma). it happens all by itself) or secondary (i.e. This is an uncommon feline problem, only seen 0.2% cats (one in 500 cats) compared to 0.7% of dogs (one in 140 dogs) or 1.9% of humans (one in 53 people). There are many harmful consequences of increased pressure inside the eyeball, including discomfort, pain, and damage to the internal structures of the eye, leading to poor function and reduced vision or blindness. The fluid is produced by the ciliary body, which is part of the soft tissue that makes up the internal structures of the eye, linking to the iris and the so-called uveal tract. There are many different reasons why the drainage of fluid can become blocked. This is similar to a bicycle tire being pumped higher than it ought to be. This results in increased internal pressure inside the eye. If this drainage of fluid is blocked for any reason, while the production of fluid continues as normal, the quantity of fluid inside the enclosed space of the eyeball increases. Normally, the eyeball is kept at the ideal pressure by a steady, even production of fluid (“aqueous humor”) inside the anterior chamber (front half) of the eye, combined with steady, even drainage of this fluid out of the eye, back into the general circulation.
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