The procedure can be used to treat astigmatism, nearsightedness, and farsightedness. It is a type of refractive error along with nearsightedness, farsightedness, and astigmatism. Concave lenses have negative dioptric value and generally correct myopia (nearsightedness). More prominent myopia (nearsightedness) and astigmatism are thought to be inherited. Nearsightedness (myopia), and blurred vision are common due to connective tissue defects in the eye. Myopia, also known as "nearsightedness", is a refractive defect of the eye. This may result in blurry vision, double vision, nearsightedness, astigmatism, and light sensitivity. In children special contact lenses appear to slow worsening of nearsightedness. Furthermore, Cut Nyak Dhien suffered from nearsightedness and arthritis as she got older. Their nearsightedness also makes them susceptible to becoming roadkill. This is not necessarily only associated with extreme nearsightedness. Currently in the US the procedure is only approved for nearsightedness. These superzoom cameras are suitable for people who have nearsightedness.