If you're able to see objects up close better than those that are far away, you may be nearsighted, a condition called myopia. The problem happens when light focuses in front of your retina instead of on it, making faraway objects look blurry. Glasses, contacts, or laser surgery may help you focus better.
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.
A person with myopia (nearsightedness) has difficulty seeing objects at a distance because the light rays converge and focus before reaching the retina. The cause is usually an elongated eyeball (which requires light rays to travel farther than they would in a normal eye), or a lens or cornea that is too strong, bending the light rays so they focus before getting to the retina (the innermost layer of the eye).
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