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Eyes

"The eye is the organ of sight (vision) in humans and animals. The eye works by transforming light waves into visual images. Eighty percent of all information received by the human brain comes from the eyes. Eye color is created by the amount and type of pigment in the iris. Multiple genes inherited from each parent determine a person’s eye color. The eye is a slightly asymmetrical globe, about an inch in diameter. The front part of the eye (the part you see in the mirror) includes: • The iris (the pigmented part) • The cornea (a clear dome over the iris) • The pupil (the black circular opening in the iris that lets light in) • The sclera (the white part) • The conjunctiva (an invisible, clear layer of tissue covering the front of the eye, except the cornea)"

Eye infection

Your eyes can get infections from bacteria, fungi or viruses. Eye infections can occur in different parts of the eye and can affect just one eye or both. Two common .....

Eye lid infection

Eyelid infections, or eyelid cellulitis is a common eye disorder among younger people. Older people are susceptible to this condition, however, it's generally not an issue as one ages, like .....

Eye irritation

Eye irritation has been defined as “the magnitude of any stinging, scratching, burning, or other irritating sensation from the eye”. It is a common problem experienced by people of all .....

Conjunctivitis

Conjunctivitis is redness and inflammation of the thin layer of tissue that covers the front of the eye (conjunctiva). It is very common. People often refer to conjunctivitis as red .....

Cataract

A cataract is a clouding of the lens inside the eye which leads to a decrease in vision. It is the most common cause of blindness and is conventionally treated .....

Corneal Infection

Corneal Infection is a condition in which the eye's cornea, the front part of the eye, becomes inflamed. The condition is often marked by moderate to intense pain and usually .....

Glaucoma

Glaucoma is an eye disease in which the optic nerve is damaged in a characteristic pattern. This can permanently damage vision in the affected eye(s) and lead to blindness if .....

Choroiditis

Inflammation of the part of the eye called the choroid (layer behind the retina). Usually only one eye is affected. More detailed information about the symptoms, causes, and treatments of .....

Cycloplegia

Cycloplegia is paralysis of the ciliary muscle of the eye, resulting in a loss of accommodation. Cycloplegia with accompanying mydriasis (loss of adaptation) can be induced pharmacologically by muscarinic antagonists. .....

Degenerative diseases eyes

A degenerative eye disease is a collective term for a disease that affects the various parts of the eye, including the retina, cornea, iris and macula. The common prognosis is .....

Scleritis

Scleritis is an inflammation of the sclera (the white outer wall of the eye). Inflammation of the sclera is usually associated with autoimmune diseases such as rheumatoid arthritis and systemic .....

Giant tears

Giant retinal tears have been defined as retinal tears that extend 90° or more around the circumference of the fundus. Nontraumatic giant retinal tears account for approximately 77% of giant .....

Eye pressure

Elevated intraocular pressure is called ocular hypertension, meaning that the pressure inside the eye is higher than normal. Eye pressure is measured in millimeters of mercury (mm Hg). Normal eye .....

Iridocyclitis

Iridocyclitis is the inflammation of the iris and the ciliary body of the eye. The iris is the colored part of the eye. The ciliary body is the group of .....

Lacrimation

Tears are secretions that clean and lubricate the eyes. Lacrimation or lachrymation is the production or shedding of tears. .....

Macular degeneration

Macular degeneration, or age-related macular degeneration (AMD) is a disease that destroys your sharp, central vision. You need central vision to see objects clearly and to do tasks such as .....

Meibomianitis

The meibomian glands, located in the upper and lower eyelids, secrete oils that help lubricate the eyes. When these glands become inflamed or infected, the condition is known as meibomianitis. .....

Myasthenia gravis

Myasthenia gravis is a chronic autoimmune neuromuscular disease characterized by varying degrees of weakness of the skeletal (voluntary) muscles of the body. The name myasthenia gravis, which is Latin and .....

Mydriasis

Mydriasis is a dilation of the pupil, usually defined as when having a non-physiological cause, but sometimes defined as potentially being a physiological pupillary response. Non-physiological causes of mydriasis include .....

Nyctalopia

Nyctalopia also called "Night Blindness" is a condition making it difficult or impossible to see in relatively low light. It is a symptom of several eye diseases. Night blindness may .....

Optic neuritis

Optic neuritis is inflammation of the optic nerve, the structure that connects the eye to the brain. The optic nerve consists of nerve tracts (axons) that originate in the retina .....

Refractive error

A refractive error is a very common eye disorder. It occurs when the eye cannot clearly focus the images from the outside world. The result of refractive errors is blurred .....

Retinal detachment

A retinal detachment is a separation of the retina from its attachments to the underlying tissue within the eye. Most retinal detachments are a result of a retinal break, hole, .....

Retinal ischemia

Retinal ischemia is an important possible aftereffect of a central retinal vein occlusion (CRVO). “Ischemia” is a term used to describe a tissue whose blood supply has been reduced to .....

Retrobulbar fibroplasia

Retrobulbar fibroplasia also known as retinopathy of prematurity (ROP), is a rare disease in which blood vessels grow abnormally behind the retina. In severe cases, this progresses to scar tissue .....

Stye

A sty (sometimes spelled stye) is a tender, painful red bump located at the base of an eyelash or under or inside the eyelid. A sty results from a localized .....

Xerophthalmia

Xerophthalmia is a medical condition in which the eye fails to produce tears. It may be caused by a deficiency in vitamin A and is sometimes used to describe that .....

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