The retina contains light-sensitive cells and other types of cells that transmit nerve impulses to the brain. When the retina becomes detached from the back of the eye, it peels away and affects vision. This can be caused by trauma to the eye,...
Neurologists specialize in disorders and diseases that affect the brain and the nervous system. Since the eyes can be affected by some of these conditions, doctors who specialize in neurology may be needed to diagnose and treat certain visual...
Stroke is one of the leading circulatory diseases in the United States. The American Stroke Association defines a stroke as a disruption in the supply of nutrients to the brain, either due to a blood vessel blockage or bleeding in the brain. The...
When a middle-aged or elderly person develops painless loss of vision in one eye, one of the possible diagnoses is anterior ischemic optic neuropathy. This condition is also known as an eye stroke. For these patients, the visual field is also...
Anterior ischemic optic neuropathy is a stroke of the optic nerve or an eye stroke. According to the "Handbook of Ocular Disease Management," this type of stroke generally occurs in one eye at a time. The two types of anterior ischemic optic...
Peripheral vision is the part of the visual field used when looking out of the side of the eye. Eye diseases that destroy peripheral vision include glaucoma, which usually affects the elderly; retinitis pigmentosa, which begins to cause vision...
A mini stroke, also known as a transient ischemic attack or a TIA, occurs when the blood flow to the brain is blocked temporarily. It often causes symptoms that mimic those of a stroke; however, according MayoClinic.com, these symptoms completely...
The retina is a transparent lining of tissue along the back wall of the inner eye. The function of the retina is to receive an image from the cornea and send it through the optic nerve to the brain for processing. The retina can separate from the...
Brain tumors can affect the optic nerve itself and the cranial nerves that control eye movement. Tumors in different parts of the brain affect different nerves and often affect several nerves at once. According to "Adams and Victor's Principles of...
Eye melanoma is a cancer affecting the eye that develops in the choroid or the iris. The primary risk factor for developing melanoma in the eye is exposure to sunlight and an increased risk exists for individuals with fair skin and blue eyes. For...
If you have homonymous hemianopia, you experience loss in half of the visual field of your eye. Right homonymous hemianopia is characterized by vision loss toward your right temple in your right eye. This condition may be caused by traumatic...
During a stroke---also known as a cerebral vascular accident---something happens to stop blood flow to the brain. Lack of oxygen and nutrients can cause visual loss including loss of peripheral vision, which is used to see objects on the side or...
Plastic surgery involving the eyelids can be either cosmetic or functional. Cosmetic procedures generally improve the appearance of the patient while functional procedures improve the function of the eyelids and can improve the vision or the...
In order to protect your eye health, it is important to have a complete eye examination regularly. An eye examination can be performed by either an optometrist or an ophthalmologist and includes a number of tests that measure vision, eye...
Prolactin is a hormone released from the anterior pituitary gland that stimulates milk production in the breast. Hyperprolactinemia, or high blood prolactin, is normal in pregnancy because milk production is necessary for the nursing of a newborn....
A stroke is a loss of blood flow to a certain part of the brain. The resulting damage depends on the location and extensiveness of the stroke. A stroke to the left side of the brain will affect cognitive, motor and sensory areas. Language,...
The optic nerves begin at the back of the eye in an area called the optic disc. They transmit visual information from the eye to the brain, which is responsible for comprehending the visual input. Many types of disorders can damage the optic...
Some migraine sufferers experience a group of telltale warning signs in the hours and days before their migraine headache appears. The warning signs, also known as a prodrome or preheadache, include both physical and psychological changes. The...
Ocular migraines are sometimes called retinal, eye or ophthalmic migraines. Migraines are neurological conditions that cause chronic headaches. At times, the eye is affected by the migraine attack, causing migraine symptoms in the eye itself. Some...
Compressive optic neuropathy occurs when lesions appear somewhere along the optic nerve. These lesions usually follow some form of head or eye trauma and contribute to the gradual loss of vision. The symptoms will vary, depending on the health of...
The eye is a vital structure in the body that allows people to see the world around them. The nerves in the eye can sometimes become damaged, or specific parts of the eye can become inflamed. This can lead to blurry vision, double vision, eye pain...
When your child comes to you and says she is seeing black spots, or floaters, you will naturally feel concerned. These black spots are probably not a reason for concern, as long as they only occur once or for only a few seconds, according to...
You may think of "multitasking" as a skill that our super-wired world demands of us, as it insists that we listen to our iPods, text our friends, and check our email all at once. But if you have suffered a brain injury, you may have discovered...
Glaucoma causes loss of peripheral vision due to damage to the retina and optic nerve. Risk factors include being over 60 years of age, having a family history of glaucoma and being of African American decent. The most common type of glaucoma,...
Stroke is a cardiovascular disease that occurs when a blood vessel leading to the brain becomes blocked or bursts, according to the American Stroke Association. The disease is behind only heart disease and cancer as the leading cause of death in...
The middle cerebral artery is one of the three major arteries that supply blood to the cerebral cortex. It supplies portions of the frontal, parietal and temporal lobes, as well as some deeper structures beneath the cortex. A stroke can affect...
Physicians grade brain tumors according to their degree of malignancy. One aspect of a tumor's appearance that affects its grade is whether it is diffuse--with no clear edge or margin--or focal--with a clear margin defining where it begins and...
The intraocular pressure in the eye is maintained by the aqueous fluid, which brings nutrients to the cornea, iris and lens, and helps the eye maintain its shape. About 4cc of aqueous fluid are produced each day; too much or too little produced or...
Eye movement exercises can help strengthen your eyes by isolating specific muscle groups. Extraocular muscles control your eye movements. The lateral and medial rectus extraocular muscles in each eye control horizontal movement toward and away...
Reaction time is one of the most important aspects of skiing and snowboarding and this sports video will show you how to improve your reaction time.