Myopia is also known as Nearsightedness or short sightedness and is one type of refractive error.
Nearsightedness can occur when your Cornea is curved too much or when your eye is longer than normal.
This is because the eyeball is too long, or the cornea is too steep, so images are focused in the inside the eye rather than on The Retina at the back of the eye.
The opposite condition of Myopia is Hyperopia also known as "farsightedness" or "long-sightedness". This is where the cornea is too flat or the eye is too short.
These are both called a
which is when your cornea or lens isn’t evenly, and smoothly curved, light rays aren't refracted properly, and you have a refractive error.
Typically, the images you see will be Blurred Vision more in one direction than another. For example, horizontal images may be more out of focus than are vertical or diagonal images.
Mainstream ophthalmologists and optometrists most commonly correct myopia and refractive errors through the use of corrective lenses, such as Eye Glasses or Contact Lenses. It may also be corrected by refractive Laser Eye Surgery , such as LASIK.
The corrective lenses have a negative optical power (i.e. are concave), which compensates for the excessive positive diopters of the myopic eye.
In some cases, patients with low level myopia use pinhole glasses. These work by reducing the blur circle formed on the retina.
Symptoms of Myopia
Nearsightedness is often first detected during childhood, from early school years through the later teens. A child with nearsightedness may:
Your eye has two parts that focus images:
In a perfectly shaped eye, each of these focusing elements has a perfectly smooth curvature like the surface of a rubber ball.
A cornea and lens with such curvature bend (refract) all-incoming light in such a way as to make a sharply focused image on the retina, at the back of your eye.
Although you can't prevent Myopia or nearsightedness, you can help protect your eyesight and your vision by following these steps:
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