myopia presentation

7/28/2019 Myopia Presentation

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Short-sightedness is a very common eyecondition that causes distant objects toappear blurred, while close objects can beseen clearly. Myopia is the medical term forshort-sightedness.

(n.d.). Retrieved April 7, 2013, from

http://www.nhs.uk/Conditions/Shortsightedness/Pages/Introduction.aspx


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Cases of short-sightedness can range frommild, where treatment may not be required,to very severe, which can significantlyaffect vision.

The symptoms of short-sightedness oftenstart around puberty and get graduallyworse until the eye is fully grown. Therefore

it's important to have regulareye examinations.


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If you notice that distant objects seem to befuzzy or your child is struggling to seethings in the distance, such as theblackboard at school, you should arrange

for a sight test with an optometrist(optician).


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Short-sightedness is a refractive eyecondition. Refractive eye conditions arecaused when problems with the structure ofthe eye affects how light rays enter your eye.

Most people are born slightly long-sighted(where close objects appear blurred) becausetheir eyes haven't grown to their full length.

The eye then grows to their normal length,which should lead to the resumption ofnormal vision.


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Generally, short-sightedness happens whenthe eye continues to grow and becomes toolong from front to back as a result, light raysdon't reach the retina at the back of the eye.

They only focus in front of it. This means thatobjects in the distance seem blurred.

Most cases of short-sightedness are caused

by a combination of genetic andenvironmental factors that disrupt the normalgrowth of the eye.


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The latest research makes it quite clear thatacquired myopia develops from excessiveaccommodation. It is most common in advanced, literate

societies and is rare in primitive, illiteratesocieties.This is not to say that an illiterateperson could not develop myopia. an illiterate person might be spending many

hours each day on some form of close workrequiring excessive accommodation that couldlead to the development of myopia.


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Actually, there are many possible factors,both known and unknown, which couldaccount for such differences, and it would bevery difficult to determine which factor ismost important in any individual case.


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The diet of the child The diet of the mother during the gestationperiod The distance the book is held from the eyes The amount of light used for reading How often the child looks up from the book How large a "cushion" of farsightedness the

child was born with


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There are three main treatment options forshort-sightedness. They are:

using corrective lenses, such as glasses orcontact lenses, to compensate for the defectin the cornea


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using laser surgery

to correct the defect(laser surgery can't be used in childrenbecause their eyes are still developing); mostpeople will have to pay to have private laser

surgery

implanting an artificial lens into the eye to

compensate for the longer eye length


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Numerous researchers have found a higher incidenceof myopia in girls than in boys. Heredity need not bethe reason for this. It can be explained by the fact thatboys have traditionally spent more time in outdoorsports activities while girls have more frequentlyturned to sewing, knitting and other close-workactivities.


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Most often, young children with short-sightedness don't complain or only complainof difficulties seeing things far away.

A nearsighted child may move closer toobjects to see clearly. If your child seems tohave trouble seeing things at a distance,

make an appointment with an Eye Doctor.


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Children need their vision checked at 6months, 3 years, and before first grade. Thisis especially important if there is a family

history of progressive nearsightedness orother eye conditions.


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It is still controversial whether progressiveshort-sightedness in children can be sloweddown.

Some recent studies suggest that the use ofthe drug atropine combined with bifocalsslows the progression of myopia.


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Children with short-sightedness can weareyeglasses. They can also start wearing contactlenses when they are mature enough to takecare of them. Often this depends on how

involved the parents are in caring for thecontact lenses.

Eye specialists rarely recommend contactlenses before a child enters his or her teens.


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Since short-sightedness is often inherited, itis not totally possible to prevent it. However,there are steps you can take to minimize its

effect. Make sure your child is examined early,especially if there is a family history ofprogressive nearsightedness or other eyeconditions. If it is uncomfortable to do work

or watch television from a standard distance,your child may already be developing short-sightedness and needs an eye examination.

myopia presentation

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