Articles starting with 'E':
| Ectropion |
Ectropion
Overview
Ectropion (ek-tro-pe-on) is the medical term to describe the eversionor saggingof the lower eyelid that results in an outward turning of the lid. It occurs mostly due to the relaxation of eyelid tissues and a lessening of muscle tone that accompanies aging. Eyelid skin is the thinnest skin of the bodymaking it more prone to stretching. Eyelid skin and muscles around the eyelid no longer hol... Read More
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| Emmetropia |
Emmetropia
When a distant image is focused perfectly on the back of the retina when accommodation is at restthis condition is termed emmetropia.
The eye functions like a camera – it has an optical system (the tear filmcorneaaqueous humorlensand vitreous humors) and a light-responsive film (the retina). The image of an object is in focus on the retina when the optical power and the length of the eye are equal. The length of the eye is fixedbut the pow... Read More
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| Entropion |
Entropion is a condition in which the lower eyelid and eyelashes roll inward towards the eye.
Overview Entropion is the medical term used to describe a condition in which the lower eyelid and eyelashes roll inward towards the eye. The skin of the eyelid and the eyelashes rub against the cornea and the conjunctivacausing ocular discomfortirritation and tearing. Entropion occurs mostly due to the relaxation of eyelid tissues as a result of aging. Eyelid skin is the thinnest sk... Read More
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| Epiretinal Membrane |
Epiretinal Membrane
What is an epiretinal membrane? An epiretinal membrane is scar tissue formed on the eye s maculalocated in the center of the eye s light-sensitive tissue called the retina. The macula provides the sharpcentral vision we need for readingdrivingand seeing fine detail. An epiretinal membrane can cause blurred and distorted central vision. Most of the eye s interior is filled with vitreousa gel-like substance that fills about 80 percent of the eye and helps it maintain a roun... Read More
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| Episcleritis |
Episcleritis
Image: Sectoral Episcleritis
Episcleritis is an acute inflammation of this episcleral tissue. The inflammation results in increasing redness in usually one eyethough sometimes it is known to be bilateral.
The white part of the eye – the sclera – is a tough layer composed of fibrous tissue that protects the eyeball. Because of its important function as a defence systemit is made up of more than one layer. Just as the human body is co... Read More
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| Epithelial Basement Membrane Dystrophy (EBMD) |
Epithelial Basement Membrane Dystrophy
What is a Corneal Dystrophy?
Generally speakinga corneal dystrophy is a non-infectiousnon-inflammatory gradual deterioration of one of the five layers of the cornea. We don’t fully understand why certain corneas become dystrophicbut we do know that some dystrophies have strong hereditary inclinationsare usually bilateraland that they can be progressive.
There is a variety of corneal dystrophiesbut the two most common ar... Read More
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| Eye Exercise |
Eye Exercise
Most people know that working out once or twice a week helps tone muscles and keep the body in shape. Unfortunatelyno one ever stops to think about the eye having muscles – and a lot of them. It is important to exercise your eyes for the same reasons it’s vital to work out. But people generally can’t measure how well they focusor how well their eyes are coordinated. Eye exercises can improve your visual skillssuch as reaction timetrackingand eye-hand/ey... Read More
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| Eye Exercises |
Eye Exercise
Most people know that working out once or twice a week helps tone muscles and keep the body in shape. Unfortunatelyno one ever stops to think about the eye having muscles – and a lot of them. It is important to exercise your eyes for the same reasons it’s vital to work out. But people generally can’t measure how well they focusor how well their eyes are coordinated. Eye exercises can improve your visual skillssuch as reaction timetrackingand eye-hand/eye-body c... Read More
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| Eyelid Blepharospasm |
Eyelid Blepharospasm
Generallyit looks like the sufferer is deliberately closing their eyes tightly.
Also known as essential blepharospasmthis condition often begins with eyelid twitching (myokymia) at a younger ageand then progresses into this more severe form. It is a chronicbilateraland variably progressive dysfunction of the nerve that controls the muscles around the eye. It manifests as an uncontrollable forceful closure of the eyelids – generallyit looks like ... Read More
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| Eyelid Myokymia (Lid Twitching) |
Eyelid Myokymia (Lid Twitching)
Frequent contributing factors include too much caffeinehigh levels of anxietyfatiguestressoverworkand a lack of sleep.
It happens to all of us – out of the blueyour eyelid starts twitching uncontrollablyand you’re sure everyone around you can see it. You shouldn’t fretthoughbecause in the majority of cases it is an occurrence that is bothersome at most. Myokymia is a general term used to describe a quivering or involunt... Read More
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| Eyes and Adulthood |
Eyes and Adulthood
When people are in their mid-fortiesthe symptoms of presbyopia typically become more pronounced.
By early adulthoodthe human eye is fully developed. At its maximum potentialit includes various components that are not easily measured by traditional eye charts such as depth perceptionnight vision and hand/eye co-ordination. Simple tasks such as readingdrivingdiscerning different colours and focusing on nearby objects may become more diffic... Read More
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| Eyewear for Different Sports |
Eyewear for Different Sports
Every sport requires something different from its playersbe it speedagilityprecisionteamwork or strength. Each sport requires unique eyewear to best protect its players from injuries while also enhancing vision for superior performance. Below is a list of popular sports and types of protective eyewear that are essential to safe and comfortable play. Information on protective eyewear involving tennisbadmintonsquashracquetball and ping-pong: Eye injuries a... Read More
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