short sighted long sighted

Category B - full version without watermark 720x576 (check terms and conditions at The version with watermark is for free to embed. Myopia (nearsightedness), also called nearsightedness or shortsightedness, is a refractive defect of the eye in which collimated light produces image focus in front of the retina when accommodation is relaxed. Those with myopia see nearby objects clearly but distant objects appear blurred. With myopia, the eyeball is too long, or the cornea is too steep, so images are focused in the vitreous inside the eye rather than on the retina at the back of the eye. The opposite defect of myopia is hyperopia or "farsightedness" or "long-sightedness" — this is where the cornea is too flat or the eye is too short. Eyeglasses, contact lenses, and refractive surgery are the primary options to treat the visual symptoms of those with myopia. Corrective lenses are used to correct refractive errors of the eye by modifying the effective focal length of the lens in order to alleviate the effects of conditions such as; nearsightedness (myopia), farsightedness (hyperopia).