Nearsightedness and Farsightedness (image) Association for Computing Machinery Share Print E-Mail Caption Shown: Range of focus for various eye refractive conditions. Myopia shifts the focal range closer, causing bad far sight. Hyperopia shifts the focal range farther (allowing focusing ability beyond infinity), causing bad near sight and lens fatigue since the crystalline lens does not relax even when looking at infinity. Presbyopia reduces the focal range and moves the nearest plane of focus away from the eye. Credit Courtesy of Nitish Padmanaban/Stanford Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.