At what age does vision typically begin to decline?

Vision typically begins to decline gradually after the age of 20. This decline may start subtly, often unnoticed initially, as the lens of the eye begins to lose flexibility and may also start to lose clarity, affecting the ability to focus on close objects or see in low light. While some individuals may experience changes in their vision earlier or later depending on various factors, such as genetics and overall health, 20 is generally viewed as a common starting point for the beginning of age-related changes in vision.

Choosing age 15 would suggest that significant vision changes already occur during teenage years, which is usually not the case for most individuals. The options indicating ages 10 or 25 may also misrepresent the typical age at which people start experiencing these declines in visual acuity. Therefore, age 20 represents a more accurate benchmark for the onset of gradual vision changes in the majority of people.