Myopia is a vision defect commonly known as nearsightedness or shortsightedness. Those with myopia can see clearly up to a certain distance, then objects begin to appear fuzzy or out of focus. Distant road signs or chalkboards are often too blurry to read, which can lead to serious problems if the myopia is left uncorrected.
If one thinks of the eyeball as a camera, then the retina that lines the inside of the eye would be the unexposed film positioned in the back. In a normal eye, light enters through the iris, bringing with it a reflected image. The cornea and lens focus this image squarely on the surface of the retina, albeit upside-down. The optic nerve sends this focused image to the visual area of the brain, where it is translated into a recognizable mental picture.
For people with myopia, however, this process does not work precisely. Because a myopic person's eyeball is slightly longer from front to back, the cornea and lens focus the image in front of the retina. This is not especially noticeable at short distances, but distant images are distorted before they hit the retina. The visual area of the brain can only process what it receives, so the unfocused images cannot be sharpened. The result is blurriness and a lack of visual detail.
Treatment for myopia may include glasses, contact lenses or laser correction. At theeyecarecompany we specialise in a procedure called orthokeratology, which has shown to slow down or stop the progression or worsening of shortsightnedness.
For more information about myopia and orthokeratology, please visit our orthokeratology page.
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