Eye Stroke is an obstructive disease that can start from simple disruptions to loss of vision.
An Eye Stroke, is an ischemia of the anterior optic neuropathy, it’s a detrimental state in which the blood supply either becomes reduced or blocked to the membranes of the front position of the optic nerve. If the occlusion occurs as the blood vessel comes forward of the optic nerve and on the retina, it is termed as branch or central retinal artery blockage.
What are the Types of Eye Stroke?
The types of Eye Stroke depend on the kind of blood vessel it affects. The BRAO and CRAO or the Retinal Artery Occlusion; this is possible when there is an occlusion in the artery that supplies blood in the retina. The retina is the part of the eye that has the light sensitive lining at the back portion of the eye which records a person’s visual images akin to a film within a camera.
If the retina is damaged then it can result to a catastrophic event. When the central artery is occluded, the outcomes are an abrupt, entire vision loss although the patient may hang on to a number of peripheral visions. In some instances, during the occlusion of an artery branching out from the central blood vessel (branch retinal artery occlusion), the patient may exhibit rapid loss of peripheral vision, accompanied by central vision disruptions. Both of these cases, during the loss of vision, the patients are typically painless.
Involving the retinal artery is usually caused when an embolus or blood cot from the other parts of the body such as the heart travels to the eye. Particular persons are at higher risk for this situation including people with hypertension or high blood pressure, artery disorders (atherosclerosis), heart disorders, cholesterol deviations and diabetes mellitus.
The other form is the BRVO and CRVO or the Retinal Vein Occlusion. The occlusion of a blood clot or thrombus of the vein in the retina is called Retinal Vein Occlusion. It may be either central retinal occlusion or branch retinal vein occlusion depending on the location of the blood vessels has the occlusion. It is most frequently seen in patients with arteriosclerosis or the hardening of the artery, glaucoma and hypertension.
What are the Causes of Eye Stroke?
The Eye Stroke is usually caused by poor distribution of blood in the vessels that supplies the front area of the optic nerve. The optic nerve is a type of cranial nerve that connects the brain to the eyes and has millions of blood vessels and nerve fibers which enables the eyes to deliver picture messages to the brain.
Even though the main reason why Eye Stroke occurs is the complete occlusion of a blood vessel that supplies the optic nerve, it is rather commonly due to a need of pressure or perfusion of tissue (ischemia). Blood pressure may vary relatively to the eye pressure and the standard flow of blood is abridged. If the oxygen and nutrient supply of the optic nerve is cut off then the nerves will be lost and damaged, resulting to blindness.
What are the Symptoms of a Stroke in the Eye?
Patients with this condition are typically given modest warning (See: Symptoms of a Stroke). Majority of patients notices a loss of vision in a single eye upon rising up at the crack of dawn with no pain. Some patients notice a shadow or dark area in their vision that includes the lower and upper half of their field of vision. Other manifestations include sensitivity to light and loss of visual contrast.
The severity of the manifestations rely on the location of the occlusion occur and the amount of blood supply is blocked. It is essential to seed urgent medical intervention, as injury will aggravate rapidly unless blood supply is restored.
How are Symptoms of a Stroke in the Eye Diagnosed?
If the physician suspects that the patient is suffering from this condition, he will evaluate the patient’s medical history and assess for cardiovascular disorders and other conditions such as diabetes and hypertension. The blood pressure will be taken as well as the central visual field and visual acuity. The doctor usually dilates the eyes of the patient and assesses the retina and the optic nerve. The optic nerve will be assessed for a pale color and a possible swelling of the optic disc.
What are the Treatments for Eye Stroke?
The treatment for Eye Stroke consists of pharmacotherapy. Corticosteroids have the ability to augment the visual acuity in some instances if started at an early stage. It reduces the leakiness of blood vessels and enhances circulation and swelling. Physicians may also prescribe drugs that can lower the eye pressure such as Miotics to improve the blood supply to the optic nerve. Researches have shown that there are potential medications that can act as neuron protectors that can restore the nerve fibres in the optic nerve.