Medications

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 essentia...

Eyes, flashing lights in the - Medical

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 ey...

Eyelids, congenital ptosis of the - Medical

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 vi...

Eyelids, adult ptosis of the - Medical

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 injur...

Eyelid myokymia - Medical

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 cas...

Eyelid granulation - Medical

Eyelid granulation: See Blepharitis.Last Editorial Review: 2/23/2003 Blepharitis: Inflammation of the eyelids. Blepharitis occurs in two forms, anterior and posterior: Anterior blepharitis affects the outside front of the eyelid, where the ey...

Eyelid - Medical

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. Last Editorial Review: 2/23/2003 6:29:42 PM...

Eyelash - Medical

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 f...

Eyedrop test - Medical

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 tis...

Eye, small - Medical

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. Microphthalmi...

Eye, no - Medical

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 re...

Eye, lazy - Medical

Eye, lazy: See: Lazy eye. Last Editorial Review: 9/8/2004 Lazy eye: An eye that diverges in gaze. A lazy eye is formally called strabismus. A lazy eye (strabismus) can be due to esotropia (cross-eyed) or to exotropia (wall-eyed). The danger of th...

Eye, dry - Medical

Eye, dry: See: Dry eye.Last Editorial Review: 5/26/2003 Dry eye: A deficiency of tears. The main symptom is usually a scratchy or sandy feeling as if something is in the eye. Other symptoms may include stinging or burning of the eye; episodes of exc...

Eye, absent - Medical

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 som...

Eye retraction syndrome - Medical

Eye retraction syndrome: See: Duane syndrome. Last Editorial Review: 1/25/2004 Duane syndrome: A congenital eye movement disorder in which there is miswiring of the eye muscles, causing some eye muscles to contract when they should not an...

Eye pressure test - Medical

Eye pressure test: A standard eye test that determines the fluid pressure inside the eye. The test is called tonometry. Increased pressure within the eye is a possible sign of glaucoma, a common and potentially very serious eye problem if it is not ...

Eye melanoma - Medical

Eye melanoma: See: Intraocular melanoma. Last Editorial Review: 11/17/2004Intraocular melanoma: An eye cancer in which the malignant cells arise in the part of the eye called the uvea. The uvea includes the iris (the colored part of the eye), th...

Eye Institute, National (NEI) - Medical

Eye Institute, National (NEI): One of the US National Institutes of Health, NEI's mission is to "conduct and support research, training, health information dissemination, and other programs with respect to blinding eye diseases, visual...

Eye Institute, National - Medical

Eye Institute, National (NEI): One of the National Institutes of Health in the U.S., NEI's mission is to "conduct and support research, training, health information dissemination, and other programs with respect to blinding eye diseases, vi...

Eye color - Medical

Eye color: The color of the iris. The genetics of eye color are complicated. Eye color is polygenic. It is determined by multiple genes. The eye color genes include EYCL1 (a green/blue eye color gene located on chromosome 19), EYCL2 (a brown eye colo...

Eye chart, Snellen's - Medical

Eye chart, Snellen's: The familiar eye chart used to measure how well you see at various distances. Snellen's chart is imprinted with block letters that line-by-line decrease in size, corresponding to the distance at which that line of letters is ...

Eye chart test - Medical

Eye chart test: This test measures how well you see at various distances. The eye chart itself -- the usual one is called Snellen's chart -- is imprinted with block letters that line-by-line decrease in size, corresponding to the distance at which ...

Eye cataract - Medical

Eye cataract: A clouding of the lens of the eye. The normally clear aspirin-sized lens of the eye starts to become cloudy. The result is much like smearing grease over the lens of a camera. It impairs normal vision. There are many causes ...

Eye bleed - Medical

Eye bleed: Medically called a subconjunctival hemorrhage. A very common cause of a painless bloody eye usually first noticed by somebody else or by the person with it when they look in the mirror. The bleeding results from a break in a small blood v...

Eye bank - Medical

Eye bank: A place to store corneas (the clear "front window" of the eye) for use in future keratoplasty (surgery to replace the cornea).Last Editorial Review: 5/11/2000...

Eye - Medical

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. The cornea is the clear front window of the eye that...

EYCL3 - Medical

EYCL3: A gene for brown/blue eye color located on chromosome 15. See also: Eye color. Last Editorial Review: 10/29/2003 Gene: The basic biological unit of heredity. A segment of deoxyribonucleic acid (DNA) needed to contribute to a function. ...

EYCL2 - Medical

EYCL2: A gene for brown eye color. See also: Eye color. Last Editorial Review: 10/29/2003 Gene: The basic biological unit of heredity. A segment of deoxyribonucleic acid (DNA) needed to contribute to a function. An official definition: Accor...

EYCL1 - Medical

EYCL1: A gene for green/blue eye color located on chromosome 19. See also: Eye color.Last Editorial Review: 10/29/2003 Gene: The basic biological unit of heredity. A segment of deoxyribonucleic acid (DNA) needed to contribute to a function. An o...

Exudative angina - Medical

Exudative angina: This has nothing whatsoever to do with the usual type of angina (angina pectoris) which is chest pain of cardiac origin. Angina trachealis is more commonly known as croup. This is an infection of the larynx, trachea, and the br...