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Refractive Errors of Eyes — A Summary. What is Refraction The phenomenon of bending of light when it passes from one object to another is called refraction.
Types of Refractive Errors Myopia Also known as nearsightedness, it occurs when the eyeball is too long for the refractive power of the cornea and lens. Due to the long size, the light gets focused in front of the retina rather than directly on it. The person suffering from myopia has trouble seeing the distant objects clearly.
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Hyperopia This is a common refractive error where people have trouble seeing near objects as compared to faraway objects. This causes the light to focus behind the retina, which makes it difficult to focus clearly on objects that are near. In this condition the eye cannot focus the light evenly onto the retina, which causes objects to appear stretched out and blurred at any distance. Presbyopia This is an age-related condition where one loses the ability to focus on anything up close.
What Causes Refractive Errors?
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Genetics : Children whose parents suffer from certain refractive errors are more likely to develop refractive errors themselves. Environmental : Factors like age and health issues can greatly affect the health of the eye and cause refractive errors. Still, he was open to trying on some other peepers for size. Not long after his original Facebook post about the error, Lee followed up with a good-natured jab at the facial recognition setup.
Error Message Eyes
Using a Snapchat cartoon filter, he transformed his face with two Powerpuff Girls -size eyes and posted the resulting image to Facebook with a caption. Be respectful, keep it civil and stay on topic. We delete comments that violate our policy , which we encourage you to read. Discussion threads can be closed at any time at our discretion.
Read more about Diabetic retinopathy. Eye discharge Do you have a discharge from the eyes? Read more about Eye discharge. Glaucoma Glaucoma is a group of eye diseases that damage the optic nerve. Read more about Glaucoma. Read more about Keratoconus. Macular degeneration This incurable disease leads to loss of vision, but you can cut your risk of macular degeneration by making healthy lifestyle choices. Read more about Macular degeneration.
Optic neuritis Eye pain and sudden loss of vision? Read more about Optic neuritis.
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Refractive errors Refractive errors are very common, causing blurred vision. Read more about Refractive errors. Retinitis pigmentosa Tunnel vision and night blindness are just 2 of the symptoms caused by the genetic eye disorder retinitis pigmentosa.
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Read more about Retinitis pigmentosa. Stye A stye occurs when the glands in your eyelids become blocked and get infected. Read more about Stye. Trachoma Did you know Australia is the only country in the developed world with trachoma, an eye infection that can cause blindness? Read more about Trachoma. Twitching eye Spasms in the eyelid can signal fatigue, stress and in rare cases, multiple sclerosis.
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Uveitis If left untreated, uveitis - or inflammation of the uvea, the middle layer of the wall of your eye, can lead to blindness. Read more about Uveitis.