What is presbyopia?

Presbyopia is defined as a gradual, age-related loss of the eye's ability to focus on nearby objects. This condition typically becomes noticeable in individuals around the age of 40 and manifests as difficulty in reading or seeing fine details up close. The underlying cause is the natural hardening of the lens of the eye, which diminishes the lens's flexibility and affects its ability to change shape for focusing on near tasks, resulting in what is commonly referred to as "aging-related farsightedness."

The other options do not accurately describe presbyopia. The notion of a condition that causes nearsightedness pertains to myopia, which involves difficulty seeing distant objects clearly rather than near. Color blindness, a condition related to the perception of colors, is entirely different and does not involve focusing ability. Temporary vision impairment could refer to a range of issues, but presbyopia is characterized by a chronic, progressive condition due to aging, rather than a brief or variable vision impairment.