Hyperopia, also known as farsightedness, longsightedness or hypermetropia, is a defect of vision caused by an imperfection in the eye (often when the eyeball is too short or the lens cannot become round enough), causing difficulty focusing on near objects, and in extreme cases causing a sufferer to be unable to focus on objects at any distance.
2. By cause
Farsightedness occurs when your eye is too short lengthwise and does not bend light correctly. This causes an image to focus behind the retina instead of directly on it, so the image is blurry. This means that close up, things are fuzzy and out of focus.
Myopia is a condition whereby images come into focus in front of the eye, resulting in a blurred image on the retina. The more severe the nearsightedness, the farther the image is from the retina, which results in more blurry vision in the distance.
2. By cause
Nearsightedness has a genetic link. If your parent has this condition, you may as well. The condition itself stems from an eyeball that is longer back to front than normal. This change in eyeball shape means light doesn’t hit the retina directly, but a point in front of it.
Nearsighted people often have headaches or eye strain and might squint or feel fatigued when driving or playing sports.
What are the differences between Hyperopia and Myopia? is a post from: HealthLob.com