Nearsightedness, or myopia, is the condition in which nearby objects are seen clearly, but distant objects appear blurry. The Figure below shows how it occurs. The eyeball is longer (from front to back) than normal. This causes images to be focused in front of the retina instead of on the retina. Myopia can be corrected with concave lenses. The lenses focus images farther back in the eye, so they fall on the retina instead of in front of it.
Matt liked school and always did well but lately he was having trouble keeping up in class. He usually sat in the back but was having trouble seeing the board. His teacher moved him to the front of the classroom and now he could see the board clearly.
Is Matt nearsighted or farsighted?