EYCL1: A gene for green/blue eye color located on chromosome 19. See also: Eye color.
EYCL3: A gene for brown/blue eye color located on chromosome 15. See also: Eye color.
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 transmits and focuses light into the eye. The iris is the colored […]
Also known as “floaters”, blurry spots that drift in front of the eyes but do not block vision. The blur is the result of debris from the vitreous casting a shadow on the retina. The spot is the image formed by a deposit of protein drifting about in the vitreous, the clear gel that fills […]
Eyetooth: An upper canine tooth which is immediately lateral to the second (lateral) incisor. So-named in the mistaken belief that this tooth was connected to a branch of the nerve that supplies the eye.
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 […]
Disease (there is more than one type) a condition of the eye that leads to progressive atrophy of the optic nerve often associated with 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 […]
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 […]
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, or due to an injury, an eye tumor, or a complication of another disease that involves […]
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. See also: Myokymia.