Final answer:
Presbyopia is the medical term for the inability to properly focus the lens as we age. It is a common vision problem associated with aging and is characterized by a gradual loss of the ability to focus on close objects. Corrective lenses are typically used to address this issue.
Step-by-step explanation:
Presbyopia is a vision problem associated with aging in which the eye gradually loses its ability to focus on close objects. The cause of presbyopia is not fully understood, but it is believed to be due to age-related changes in the lens and the muscles that control the lens. The first signs of presbyopia are usually noticed between the ages of 40 and 50. Corrective lenses are commonly used to address presbyopia.