The World Health Organization published a fact sheet last June 2012 which revealed that about 285 million people around the globe are visually impaired, and that 90% of them live in developing countries. On the other hand, the data also states that the number of people whose poor visions were caused by diseases decreased in the last couple of decades. With today's modern medicine, about 80% of all cases of visual impairment can actually be cured, and the drastically reduced number of poor vision cases is good proof of that.
Usually, surgery is used to permanently treat bad eyesight; most cases of visual impairment involve abnormalities in the structure of the eye, and so by operating on these problems, vision can be permanently corrected. Ocular complications such as cataract and glaucoma are cured through eye surgery. For conditions like nearsightedness, farsightedness, and astigmatism, there's another kind of “surgery” used to treat them.
Myopia (nearsightedness), hyperopia (farsightedness), and astigmatism are caused by the irregularities in the eye structure itself. When regular surgery can't treat them, LASIK can be used instead; it's a laser-based application that reshapes the eye to grant proper vision. Unlike traditional surgery, LASIK only involves making a small flap just enough for the laser to manipulate the problem area. Eyesight problems may still persist to this day but at least there are cures out there.
Usually, surgery is used to permanently treat bad eyesight; most cases of visual impairment involve abnormalities in the structure of the eye, and so by operating on these problems, vision can be permanently corrected. Ocular complications such as cataract and glaucoma are cured through eye surgery. For conditions like nearsightedness, farsightedness, and astigmatism, there's another kind of “surgery” used to treat them.
Myopia (nearsightedness), hyperopia (farsightedness), and astigmatism are caused by the irregularities in the eye structure itself. When regular surgery can't treat them, LASIK can be used instead; it's a laser-based application that reshapes the eye to grant proper vision. Unlike traditional surgery, LASIK only involves making a small flap just enough for the laser to manipulate the problem area. Eyesight problems may still persist to this day but at least there are cures out there.
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