Bleeding of the Retina in the Eye in Cats

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Retinal Hemorrhage in Cats

Retinal hemorrhage is a condition of the innermost lining of the eye in which there is a local or generalized area of bleeding into that lining. This inner lining is referred to as the retina. The retina lays just beneath the middle choroid coat, which in turn lies between the retina and the sclera – the white outer lining of the eye (the part of the eye that can be seen). The choroid coat contains connective tissue and blood vessels, which deliver nutrients and oxygen to the outer layers of the retina. In some cases the retina may separate from this layer. This is termed retinal detachment. The causes of retinal hemorrhage are usually genetic and breed specific.

Symptoms and Types

  • Vision loss / blindness, demonstrated by bumping into objects
  • Bleeding in other body parts – small bruises throughout the body
  • Blood in urine, feces
  • Whitish-appearing pupil
  • Pupil may not contract when bright light is shone in the eyes
  • Sometimes, no signs may be observed

Causes

Genetic (present at birth):

  • Faulty development of the retina or the lubricating fluids of the eyes (vitreous humor)

Acquired (condition that develops sometime later in life/after birth):

Diagnosis

Your veterinarian will perform a complete physical exam on your cat. You will need to give your veterinarian a thorough history of your cat’s health, onset of symptoms, and possible incidents that might have led to this condition. Standard laboratory tests include a blood chemical profile, a complete blood count, an electrolyte panel, a blood pressure test and a urinalysis, so as to rule out other causes of disease.

The physical exam will entail a full ophthalmic exam using a slit lamp microscope. During this exam, the retina at the back of the eye will be closely observed for abnormalities. The electrical activity of the retina will also be measured. An ultrasound of the eye may also be done if the retina cannot be visualized due to hemorrhaging. Samples of vitreous humor (eye fluid) may be taken for laboratory analysis.

  • Generalized (systemic) high blood pressure
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sclera

The outer layer of the eye that helps it to keep its round shape; the eye white.

systemic

Something that is related to the whole body and not just one particular part or organ

vitreous humor

A type of jelly-like substance that is found inside the vitreous chamber

retina

The layer of the eye that is charged with receiving and processing images

urinalysis

An in-depth examination of the properties of urine; used to determine the presence or absence of illness

ophthalmic

Anything having to do with the eye or care of the eye

blood pressure

The amount of pressure applied by the blood on the arteries.

hemorrhage

Extreme loss of blood

hypertension

High blood pressure

anemia

A condition of the blood in which normal red blood cell counts or hemoglobin are lacking.

ophthalmologist

A professional skilled in the study of the eye

Courtesy of petmd.com Original Article

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