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Diplopia
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Diplopia Diplopia is a visual disorder that results in double vision, such that when the viewer looks at an object it seems as if there are two objects. It can arise when the eye muscles are not functioning as intended, and the eyes are not correctly aligned while focusing on an object. This binocular diplopia disappears when one eye is closed.
RELATED TERMS--------------------------------------
Diplopia
Diplopia is a visual disorder that results in double vision, such that when the viewer looks at an object it seems as if there are two objects. It can arise when the eye muscles are not functioning as intended, and the eyes are not correctly aligned while focusing on an object. This binocular diplopia disappears when one eye is closed.
Vision
The sense of sight.
Binocular
Using both eyes at the same time. Binocular vision is the most important element of depth perception.
SIMILAR TERMS--------------------------------------
Diploe
The soft spongy material between the inside table and outside table (the interior and exterior bony plates) of the skull. The diploe contains bone marrow.
Diploid
Refers to a cell having two sets of chromosomes (in humans, 46 chromosomes). In contrast, a haploid cell, such as a gamete, has only one set of chromosomes (23 in humans).
Diplopia, binocular
Double vision (diplopia) that is only evident when looking through both eyes and disappears if one eye is closed or covered. The condition is caused by misalignment of the eyes by the extraocular muscles (the muscles around the eyeball that control gaze). This may be due to strabismus (misalignment of the eyes from birth), neurologic damage to the extraocular muscles (as from a brain abscess, stroke, head trauma or brain tumor), diabetes, myasthenia gravis, Graves disease, or trauma to the eye muscles, as from a fracture of the orbit.
Diplopia, monocular
Double vision (diplopia) in only one eye. The double vision persists when the other eye is covered. Monocular diplopia can be caused by astigmatism (abnormal curvature of the front of the cornea), keratoconus (cone-shaped cornea), pterygium (thickening of the conjunctiva over the cornea), a cataract, dislocation of the lens, a mass in the eyelid pressing on the front of the eye, xerophthalmia (dry eye), and certain retinal problems. Treatment depends upon the specific cause.
PREVIOUS AND NEXT TERMS--------------------------------------
Dermatitis
Dermatitis, also known as eczema, is a skin irritation characterized by red, flaky skin, sometimes with cracks or tiny blisters. Dermatitis is extremely itchy, but scratching damages the fragile skin and exacerbates the problem so it is important for people with eczema to try to leave the area alone.
Dominant gene
A gene which, when present on a chromosome, passes on a certain physical characteristic, even when the gene is present in only one copy. A dominant disorder can be inherited from only one parent.
Depression
A mental state of depressed mood characterized by feelings of sadness, despair and discouragement. Depression ranges from normal feelings of the blues through dysthymia to major depression. It in many ways resembles the grief and mourning that follow bereavement, there are often feelings of low self esteem, guilt and self reproach, withdrawal from interpersonal contact and physical symptoms such as eating and sleep disturbances.
Diabetes Mellitus
A metabolic disease caused by an absolute or a relative deficiency of insulin, a hormone that controls how the body processes glucose, protein, and fats. When the body's insulin supply is decreased, it cannot process carbohydrates and it compensates by overprocessing fats and protein. The condition is characterized by chronic high blood sugar and sugar in the urine. Diabetes mellitus can result in coma. Over time, complications can include nerve injury, blindness, kidney failure, and premature atherosclerosis with all of its complications.
Diabetic Retinopathy
Severe changes in the back of the eye, or the retina, caused by diabetes. These may include ongoing microaneurysms, retinal hemorrhages or swelling in the central part of the eye (macula). The proliferative type involves the growth of abnormal blood vessels in the retina or at the optic disc with blood leaking into the jelly part of the eye (vitreous), or a detachment of the retina.
Diplopia
Dyscalculia
Is a term used to refer to learning disabilities that involve arithmetic comprehension or computation. This difficulty in mastering concepts or computations is usually associated with neurological dysfunction or brain damage and is classified as developmental (occurring before birth from genetic or congenital problems) or acquired (occurring after birth usually from a traumatic brain injury).
Dysgraphia
Dysgraphia is the inability to write, regardless of ability to read. People with dysgraphia often can write, but lack co-ordination, and find other fine motor tasks like tying shoes difficult. They also lack basic spelling skills, and often will say the wrong word when trying to formulate thoughts.
Dyslexia
A brain-based type of learning disability that specifically impairs a person's ability to read. These individuals typically read at levels significantly lower than expected despite having normal intelligence. Although the disorder varies from person to person, common characteristics among people with dyslexia have difficulty with phonological processing (the manipulation of sounds) and/or rapid visual-verbal responding.
Dystonia
Dystonia is a neurological movement disorder with involuntary muscle contractions, forcing specific parts of the body into abnormal movements or positions, sometimes causing pain.
Dental phobia
Dental phobia is a fear, or phobia, traditionally defined as an irrational and exaggerated fear of dentists and dental procedures.
RELATED TERMS--------------------------------------
Diplopia
Diplopia is a visual disorder that results in double vision, such that when the viewer looks at an object it seems as if there are two objects. It can arise when the eye muscles are not functioning as intended, and the eyes are not correctly aligned while focusing on an object. This binocular diplopia disappears when one eye is closed.
Vision
The sense of sight.
Binocular
Using both eyes at the same time. Binocular vision is the most important element of depth perception.
SIMILAR TERMS--------------------------------------
Diploe
The soft spongy material between the inside table and outside table (the interior and exterior bony plates) of the skull. The diploe contains bone marrow.
Diploid
Refers to a cell having two sets of chromosomes (in humans, 46 chromosomes). In contrast, a haploid cell, such as a gamete, has only one set of chromosomes (23 in humans).
Diplopia, binocular
Double vision (diplopia) that is only evident when looking through both eyes and disappears if one eye is closed or covered. The condition is caused by misalignment of the eyes by the extraocular muscles (the muscles around the eyeball that control gaze). This may be due to strabismus (misalignment of the eyes from birth), neurologic damage to the extraocular muscles (as from a brain abscess, stroke, head trauma or brain tumor), diabetes, myasthenia gravis, Graves disease, or trauma to the eye muscles, as from a fracture of the orbit.
Diplopia, monocular
Double vision (diplopia) in only one eye. The double vision persists when the other eye is covered. Monocular diplopia can be caused by astigmatism (abnormal curvature of the front of the cornea), keratoconus (cone-shaped cornea), pterygium (thickening of the conjunctiva over the cornea), a cataract, dislocation of the lens, a mass in the eyelid pressing on the front of the eye, xerophthalmia (dry eye), and certain retinal problems. Treatment depends upon the specific cause.
PREVIOUS AND NEXT TERMS--------------------------------------
Dermatitis
Dermatitis, also known as eczema, is a skin irritation characterized by red, flaky skin, sometimes with cracks or tiny blisters. Dermatitis is extremely itchy, but scratching damages the fragile skin and exacerbates the problem so it is important for people with eczema to try to leave the area alone.
Dominant gene
A gene which, when present on a chromosome, passes on a certain physical characteristic, even when the gene is present in only one copy. A dominant disorder can be inherited from only one parent.
Depression
A mental state of depressed mood characterized by feelings of sadness, despair and discouragement. Depression ranges from normal feelings of the blues through dysthymia to major depression. It in many ways resembles the grief and mourning that follow bereavement, there are often feelings of low self esteem, guilt and self reproach, withdrawal from interpersonal contact and physical symptoms such as eating and sleep disturbances.
Diabetes Mellitus
A metabolic disease caused by an absolute or a relative deficiency of insulin, a hormone that controls how the body processes glucose, protein, and fats. When the body's insulin supply is decreased, it cannot process carbohydrates and it compensates by overprocessing fats and protein. The condition is characterized by chronic high blood sugar and sugar in the urine. Diabetes mellitus can result in coma. Over time, complications can include nerve injury, blindness, kidney failure, and premature atherosclerosis with all of its complications.
Diabetic Retinopathy
Severe changes in the back of the eye, or the retina, caused by diabetes. These may include ongoing microaneurysms, retinal hemorrhages or swelling in the central part of the eye (macula). The proliferative type involves the growth of abnormal blood vessels in the retina or at the optic disc with blood leaking into the jelly part of the eye (vitreous), or a detachment of the retina.
Diplopia
Dyscalculia
Is a term used to refer to learning disabilities that involve arithmetic comprehension or computation. This difficulty in mastering concepts or computations is usually associated with neurological dysfunction or brain damage and is classified as developmental (occurring before birth from genetic or congenital problems) or acquired (occurring after birth usually from a traumatic brain injury).
Dysgraphia
Dysgraphia is the inability to write, regardless of ability to read. People with dysgraphia often can write, but lack co-ordination, and find other fine motor tasks like tying shoes difficult. They also lack basic spelling skills, and often will say the wrong word when trying to formulate thoughts.
Dyslexia
A brain-based type of learning disability that specifically impairs a person's ability to read. These individuals typically read at levels significantly lower than expected despite having normal intelligence. Although the disorder varies from person to person, common characteristics among people with dyslexia have difficulty with phonological processing (the manipulation of sounds) and/or rapid visual-verbal responding.
Dystonia
Dystonia is a neurological movement disorder with involuntary muscle contractions, forcing specific parts of the body into abnormal movements or positions, sometimes causing pain.
Dental phobia
Dental phobia is a fear, or phobia, traditionally defined as an irrational and exaggerated fear of dentists and dental procedures.
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This dictionary contains 19186 terms.
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