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Eyelid
Eyelid The lid or cover of the eye, a movable fold of skin and muscle that can be closed over the eyeball or opened at will. Each eye has an upper and a lower lid. An eyelid is also called a palpebra.
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Eye
The organ of sight. The eye has a number of components. These components include but are not limited to the cornea, iris, pupil, lens, retina, macula, optic nerve, choroid and vitreous.
Skin
Skin is an organ of the integumentary system; which is composed of a layer of tissues that protect underlying muscles and organs. Skin is used for insulation, vitamin D production, sensation, and excretion (through sweat).
Muscle
Tissue made up of bundles of long, slender cells that contract when stimulated.
Eyelid
The lid or cover of the eye, a movable fold of skin and muscle that can be closed over the eyeball or opened at will. Each eye has an upper and a lower lid. An eyelid is also called a palpebra.
Palpebra
The eyelid.
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Eyelash
One of the familiar stiff hairs that project from the margin of the eyelid. Eyelashes tend to be noticed mainly when something goes wrong with them. An eyelash gets in your eye and irritates it; you have an ingrown eyelash; your eyelashes fall out, etc.
Eyelid myokymia
Fine continuous contractions of the eyelid muscle, typically involving one of the lower eyelids, less often an upper eyelid. The condition occurs spontaneously, sometimes triggered by stress, fatigue, caffeine or alcohol. In most cases, the condition is benign and ceases of its own accord.
Eyelids, adult ptosis of the
Drooping of the upper eyelids in adults, most commonly due to separation of the tendon of the lid-lifting (levator) muscle from the eyelid. This may occur with age, after cataract or other eye surgery, an injury, eye tumor or a complication of other diseases involving the levator muscle or its nerve supply, such as diabetes. If treatment is necessary, it is usually surgical. Sometimes a small tuck in the lifting muscle and eyelid can raise the lid sufficiently. More severe ptosis requires reattachment and strengthening of the levator muscle.
Eyelids, congenital ptosis of the
Drooping of the upper eyelids at birth. The lids may droop only slightly or they may cover the pupils and restrict or even block vision. Moderate or severe pstosis calls for treatment to permit normal vision development. If not corrected, amblyopia ("lazy eye") may develop which can lead to permanently poor vision. Ptosis at birth is often caused by poor development of the levator muscle which lifts the eyelid. Children with ptosis may tip their heads back into a chin-up position to see underneath the eyelids or raise their eyebrows in an attempt to lift up the lids. Congenital ptosis rarely improves with time. Mild or moderate ptosis usually does not require surgery early in life. Treatment is usually surgery to tighten the eyelid-lifting muscles, the levators. If the levator is very weak, the lid can be attached or suspended from under the eyebrow so that the forehead muscles can do the lifting. Even after surgery, focusing problems can develop as the eyes grow and change shape. All children with ptosis, whether they have had surgery or not, should therefore be followed by an ophthalmologist.
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Eye, absent
Also called anophthalmia, a congenital malformation (birth defect) of the globe. Anophthalmia refers, strictly speaking, to absence of the globe and ocular tissue from the orbit. However, in most cases of anophthalmia, CT scans show some remnants of the globe, indicating they represent severe microphthalmia (small eyes).
Eye, no
Also called anophthalmia, a congenital malformation (birth defect) of the globe. Anophthalmia refers, strictly speaking, to absence of the globe and ocular tissue from the orbit. However, in most cases of anophthalmia, CT scans show some remnants of the globe, indicating they represent severe microphthalmia (small eyes).
Eye, small
Also called microphthalmia, an abnormally small eye, a congenital malformation (birth defect) of the globe. The related term "anophthalmia" means no eye and refers to absence of the globe and ocular tissue from the orbit.
Eyedrop test
There are many types of eyedrops and many types of eyedrop tests. One of the most common eyedrop tests is pupil dilation. This examination enables your eye care professional to see more of your retina, the light-sensitive layer of tissue at the back of your eye.
Eyelash
One of the familiar stiff hairs that project from the margin of the eyelid. Eyelashes tend to be noticed mainly when something goes wrong with them. An eyelash gets in your eye and irritates it; you have an ingrown eyelash; your eyelashes fall out, etc.
Eyelid
Eyelid myokymia
Fine continuous contractions of the eyelid muscle, typically involving one of the lower eyelids, less often an upper eyelid. The condition occurs spontaneously, sometimes triggered by stress, fatigue, caffeine or alcohol. In most cases, the condition is benign and ceases of its own accord.
Eyelids, adult ptosis of the
Drooping of the upper eyelids in adults, most commonly due to separation of the tendon of the lid-lifting (levator) muscle from the eyelid. This may occur with age, after cataract or other eye surgery, an injury, eye tumor or a complication of other diseases involving the levator muscle or its nerve supply, such as diabetes. If treatment is necessary, it is usually surgical. Sometimes a small tuck in the lifting muscle and eyelid can raise the lid sufficiently. More severe ptosis requires reattachment and strengthening of the levator muscle.
Eyelids, congenital ptosis of the
Drooping of the upper eyelids at birth. The lids may droop only slightly or they may cover the pupils and restrict or even block vision. Moderate or severe pstosis calls for treatment to permit normal vision development. If not corrected, amblyopia ("lazy eye") may develop which can lead to permanently poor vision. Ptosis at birth is often caused by poor development of the levator muscle which lifts the eyelid. Children with ptosis may tip their heads back into a chin-up position to see underneath the eyelids or raise their eyebrows in an attempt to lift up the lids. Congenital ptosis rarely improves with time. Mild or moderate ptosis usually does not require surgery early in life. Treatment is usually surgery to tighten the eyelid-lifting muscles, the levators. If the levator is very weak, the lid can be attached or suspended from under the eyebrow so that the forehead muscles can do the lifting. Even after surgery, focusing problems can develop as the eyes grow and change shape. All children with ptosis, whether they have had surgery or not, should therefore be followed by an ophthalmologist.
Eyes, flashing lights in the
There are a number of causes of spontaneous flashing light sensations in the eye. A sensation of flashing lights can be caused when the vitreous (the clear, jelly-like substance that fills the middle of the eye) shrinks and tugs on the retina. These flashes of light can appear off and on for several weeks or months. With age, it is more common to experience flashes. They usually do not reflect a serious problem. However, if you notice the sudden appearance of light flashes or a sudden increase in flashing lights, you should see your ophthalmologist immediately to see if the retina has been torn or if there is another cause. Flashes of light that appear as jagged lines or "heat waves" in both eyes, often lasting 10-20 minutes, are different. They are usually caused by migraine, a spasm of blood vessels in the brain. Jagged lines or "heat waves" can also occur without a headache in which case they are termed ophthalmic migraine, or migraine without headache.
Eyes, glaucoma
Disease (there is more than one type) characterized by increased pressure within the eye. Glaucoma can lead to blindness. Glaucoma is five times more likely to occur in Blacks than in Whites. Early detection of glaucoma is essential to the preservation of vision. Glaucoma can be treated with medications, laser or traditional surgery.
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