What does the term "presbyopia" refer to?

Presbyopia refers to the age-related loss of the ability to focus on close objects, which typically becomes noticeable in individuals around the ages of 40 to 50. As people age, the lens of the eye loses its elasticity, making it more difficult to change shape and focus on near vision tasks, such as reading or doing close-up work. This natural aging process affects nearly everyone to some degree and is distinct from other vision conditions, as it specifically pertains to the inability to accommodate for near objects.

The other choices describe different vision-related conditions: loss of color vision pertains to difficulty distinguishing colors, increased sensitivity to light relates to issues with glare and bright lights, and difficulty seeing in low light refers to issues such as night blindness. These conditions arise from various causes and are not specifically tied to the natural aging of the lens as presbyopia is.