The retina in each eye is composed of photoreceptors, each designed to detect specific visual stimuli, for example, light, darkness, or color. To detect objects in the environment, the eyes move to place the object on the fovea, the part of the...
Your child's eyes and brain work together in order to provide her with sight. Beginning at birth, her ability to move her eyes back and forth will start to develop. However, you may notice abnormal eye movements during her childhood that can...
Involuntary eye movement, a condition doctors refer to as nystagmus, causes the eyes to move up and down or side to side. Some people experience circular eye movement as well. People with nystagmus might not realize their eyes move unless the eyes...
Involuntary eye movement, a condition called nystagmus, causes the eyes to move in uncontrollable patterns. The eyes may move vertically, horizontally or in a circular motion. Some children have nystagmus at birth, but involuntary eye movement may...
Disconjugate eye movements in children are a type of ocular deviation, or abnormal eye movement. The eyes of a child with disconjugate eye movements will move independently of one another. A number of medical conditions ranging from congenital...
Eyes normally move only in response to stimuli or direct commands from the brain. If severe, rapid involuntary eye movements may interfere with vision. Rapid eye movement, or REM, can occur as a natural process or as a symptom of disease. It may...
While sleep is vital for health and well-being, getting restful sleep is not always easy. Rapid eye movement, REM, is a necessary phase of the sleep cycle in which dreaming occurs. Ensuring what's commonly termed "a good night's sleep" requires,...
Erratic eye movement, or nystagmus, is involuntary and can be congenital or acquired. Symptoms can appear in infants as young as 6 weeks, reports the American Association for Pediatric Ophthalmology and Strabismus. Treatment options depend on the...
Your child's sleep patterns will change dramatically as he matures into an adolescent. Rapid eye movement, or REM, is more prominent in newborns and they may even experience REM while they are awake--usually during an aroused state such as when...
Abnormal eye movements impact a person's appearance and visual function. The eyes may oscillate side to side---a condition called "nystagmus." Alternatively, the motion may be restricted or jerky, or the eye may appear to be wandering. Many...
Your baby's ability to move his eyes and focus on objects improves as he gets older. However, improper eye development, cataracts and prematurity can place your baby at risk for eye problems. If you know what to expect from his eye movements as he...
Uncontrollable eye movements, medically known as nystagmus, is a condition in which the eyes move up and down, side to side or in a circular motion, says MedlinePlus. It states that these erratic eye movements are due to an abnormality in the...
Nystagmus, the medical term for unintentional eye movements, has many causes. Unintentional eye movements are are usually bilateral--most often go from side to side--but can also go up and down or rotational, in a circle. Unintentional eye...
Young children and infants can't tell parents about vision problems and, in most cases, when a child has an eye problem from birth, he may not know his eyesight could appear differently. Checkups with a pediatrician may not detect subtle eye...
Seizures are due to electrical activity in the brain, which results in changes in consciousness and movement. Symptoms of seizures vary in patients: some patients may just have a staring spell, while others may experience twitching in their limbs....
The involuntary eye movement called nystagmus may be related to a number of factors including poor brain control of eye movement, very near or far sightedness, scarred retina or optic nerve, a brain tumor or neurologic disorder. It may be caused...
Some people experience episodes of uncontrolled eye movement, causing the eyes to shift up and down, side to side or in a circular pattern. Causes include eye disorders, head injury or stroke, but in some cases, doctors cannot determine a cause....
Vision changes can occur for a number of reasons. Most people who require prescription eyewear require an adjustment to the lens every two to three years, and this stems from the natural changes of the eye. Conditions such as cataracts, macular...
The brainstem projects from the center of the underside of the brain. This elongated structure connects the upper areas of the brain to the spinal cord. Evolutionarily, the brainstem is one of the oldest parts of the brain. It is responsible for...
Sundowning appears in infants as an abnormality of the eye and is typically a sign of illness or injury to the brain. Infants with sundowning eyes have a downward gaze, and the white part of the eye can be seen above the colored portion....
Multiple sclerosis (MS) is a disease that causes damage to the myelin sheath, which is a material that protects nerve cells. MS affects the spinal cord and the brain. The damage that MS causes has the effect of slowing or blocking signals between...
Eye jerking, a condition known as nystagmus, is a condition that may occur in one or both eyes. These involuntary eye movements may stem from neurological conditions, inner ear problems, injury or medications. Some people may have a congenital...
The two cavernous sinuses are venous drainage areas on either side of the pituitary gland, at the base of the skull. Several cranial nerves and the internal carotid artery pass through the sinus. Thrombosis, or clotting, in the sinus can be caused...
Children and adults alike may have a condition commonly referred to as crossed eyes, a condition doctors call strabismus. For some people with strabismus, prescription glasses may help correct crossed eyes. Others may need special exercises or...
Nystagmus is the involuntary movement of the eyes in rapid motion, back and forth, up and down and/or in a rotary fashion. Nystagmus is often a symptom of a disease or condition, or a side effect of certain medications. Nystagmus is associated...
A stroke occurs when the brain does not receive enough nourishing blood. Strokes require immediate treatment to limit the amount of damage to the brain and increase chances for survival. However, even with prompt treatment, strokes may cause...
All of the muscles of the eye are active in any eye movement. Muscles control right-to-left and up-and-down movement. Extrensic (extraorbital) muscles include the levator palpebrae superioris, medial and lateral rectus, superior and inferior...
Nystagmus is an involuntary eye movement disorder that includes uncontrollable rapid eye activity from side-to-side, up and down or in rotational directions, in one or both eyes. Caused by abnormal brain functions, nystagmus is either present at...
Glycine is the smallest amino acid among those commonly found in proteins. In the human body, it is synthesized in the liver from other amino acids, and therefore it is termed as nonessential. Like other amino acids, it is used to make proteins,...
Views 0
Views 0
Views 0
