Final answer:
Presbyopia is a vision problem associated with aging that causes an inability to focus on close objects. It is characterized by retinal damage.
Step-by-step explanation:
Presbyopia is a common vision problem associated with aging in which the eye gradually loses its ability to focus on close objects. It is characterized by an inability to focus on an object as a result of retinal damage. The precise cause of presbyopia is not known for certain, but it is believed that the lens may become less elastic with age, and the muscles that control the lens may lose power as people grow older. Most older people with this problem use corrective lenses to focus on close objects because surgical procedures to correct presbyopia have not been as successful as those for myopia and hyperopia.