During our youth, the natural lens has the ability to change shape and power. This allows us to focus on close objects through a process of lens power change called accommodation. As we age, the natural lens becomes stiffer and loses the ability to change shape. This is termed presbyopia, which is the loss of accommodation, and the need for reading glasses, bifocals, or other visual aids to facilitate near work. LASIK cannot directly "fix" accommodation, but there are a variety of strategies that can be successful, including blended vision or monovision, in which one eye is corrected for better distance vision and one eye is corrected for better near vision.