Types of Refractive Eye Disorders
Refractive Eye Disorders: Types list
The list of types of Refractive Eye Disorders mentioned in various sources includes:
When the cornea is curved too much, or if the eye is too
long, faraway objects will appear blurry because they are
focused in front of the retina. This is called myopia, or
nearsightedness. Myopia affects over 25 percent of all adult
Hyperopia, or farsightedness, is the opposite of myopia.
Distant objects are clear, and close-up objects appear blurry.
With hyperopia, images focus on a point beyond the retina.
Hyperopia results from an eye that is too short.
Astigmatism is a condition in which the uneven curvature of
the cornea blurs and distorts both distant and near objects. A
normal cornea is round, with even curves from side to side and
top to bottom. With astigmatism, the cornea is shaped more
like the back of a spoon, curved more in one direction than in
another. This causes light rays to have more than one focal
point and focus on two separate areas of the retina,
distorting the visual image. Two-thirds of Americans with
myopia also have astigmatism. (Source: excerpt from Facts About the Cornea and Corneal Disease: NEI)
Refractive Eye Disorders: Related Disease Topics
More general medical disease topics related to Refractive Eye Disorders include:
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