Hyeropia & Laser Eye Surgery.

Zach
Hyeropia, or farsightedness, is the inability to focus on near objects. the objects that are close to the person with farsightedness are blurry and difficult to focus on.






Causes Of Hyeropia

hyeropia is another word for farsightedness.this occurs when the eye is too short from back to front, so the light does not always hit the correct part of the eye. it can also be caused by a cornea that is too flat, or if the cornea is too far behind the lens. this usually occurs with age, genetics or injury.
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the point where the light mets in the eye, is behind where it is supposed to connect.
the point where the light mets in the eye, is behind where it is supposed to connect.


Symptoms
This causes peoples vision to be blurry or fuzzy when they look at things. this condition can cause headaches, eyestrain, and can make you squint. this can also make people feel tired when performing tasks that require farsightedness to work properly.
Farsighted people sometimes have headaches or eye strain and may squint or feel fatigued when performing work at close range.
Treatment Of Hyeropia
this can be treated by using glasses or contact lenses. they send the light to the correct part of the eyeball, nullifying the hyeropia. laser eye surgury, or refractive surgury can reduce or take away the probelm in your eyes.
there are four common laser eye surgery methods. PRK is a method where the surgeon takes off the out layer of the eye, the epithelium, and takes a laser beam, and vaporizes small amounts of tissue below the surface of the cornea. it takes approximatly one week to heal. LASIK is the second method that is used to treat eyesight. the surgon cuts away the outer layer of the eye, and then uses the laser to remove certain amounts of tussue from the cornea. it does not take very long to heal. LASEK is a variatiopn of both LASIK and PRK eye surgury. they surgeon again cuts away the outer layer of the eye, and then applies alcohol to loosen the layer that has been cut. the laser beam is shone on the tissue under the epithelium. the healing process takes slightly longer, as it is around two weeks. Epi-LASIK is the same as LASEK, but the outer layer is removed using a blunt object, not a sharp one.

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Classification
there are three different classifications of hyeropia. simple hyeropia, pathological hyeropia and functional hyeropia. simple hyeropia is from a natural change in the structure, be it genetic or something else biological. pathological hyeropia would be from a disease or virus in the eye. functional hyeropia is from the paralysis of accommodation.
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Diagnosis
to diagnose hyeropia, eye doctors perform an eye exam on the patient. The patient is asked to read out words and letters from varying distances. if it is decided that the patient does have hyeropia, then a retinoscope will be used to see how light effects the eye. the eye doctor will then determine what is needed to fix the problem.

Effects On Humanity

laser eye surgery has improved the lifestyle of many people. they no longer need to wear glasses, which allows them to do many more things, such as sports and other activities. since people who have had this surgery do not need glasses or contact lenses, they are free to do what they want, without having to worry about keeping their glasses clean, or preventing the contacts from falling out of the eye.

Glossary
hyerpoia- farsightedness far away objects are in focus, near objects are blurry.



Works Cited

http://www.clearlylasik.com/html/farsightedness.html
http://www.lasersurgeryforeyes.com/hyperopia.html
http://www.lensshopper.com/vision-surgery/hyperopia-surgery.asp
http://www.londonvisionclinic.com/blog/long-sightedness/
http://www.lasikplus.com/lasik/farsightedness-hyperopia