Curvature myopia affects long-distance vision. People with curvature myopia have a cornea that is curved too much. The cornea and lens work together to focus incoming light directly on the retina. When the cornea is abnormally curved it causes light to refract in front of the retina instead of on it, which prevents the eye from clearly focusing on an object that's far away. In severe cases, objects may need to be within a few inches of the eyes to be seen clearly.
Myopia (Nearsightedness)
When you can see nearby objects, but not those far away, you are nearsighted -- that is, you have myopia. It's a common condition that tends to run in families, and with glasses or contact lenses is easily corrected.
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Some people have been led to believe that wearing contact lenses will permanently correct nearsightedness so that eventually they won’t need either contacts or eyeglasses.
There is no evidence that wearing contact lenses produces a permanent improvement in vision or prevents nearsightedness from getting worse.