Near or short-sightedness, also called myopia, is a refractive defect of the eye. Those with myopia see nearby objects clearly but distant objects appear blurred. Long or far-sightedness, also called hyperopia or hypermetropia, is a defect of vision caused by an imperfection in the eye. Those with hyperopia have an inability to focus on near objects, and in extreme cases causing a sufferer to be unable to focus on objects at any distance.