Poor vision in the eyes is often the result of the need for corrective eyewear. Myopia (nearsightedness) occurs when light rays focus in front of the retina because the eye is too long. This results in objects in the distance being blurry. Hyperopia (farsightedness) is when light rays focus behind the retina. This can makes things at near harder to see and can also affect distance in some cases. Astigmatism occurs when the eyes are too curved. This results in light rays focusing in different spots, causing visual distortion at near and distance.