What is the term for the inability to focus on near objects due to aging?

The term for the inability to focus on near objects due to aging is "presbyopia." This condition typically develops as individuals enter their 40s or 50s and is a natural part of the aging process. The eye's lens becomes less flexible, making it difficult to focus on close-up tasks such as reading or sewing.

In contrast, myopia refers to nearsightedness, where distant objects appear blurry, while close objects can be seen clearly. Hyperopia, or farsightedness, involves difficulty focusing on close objects but can often involve clear vision at a distance. Astigmatism is caused by an irregular curvature of the cornea or lens, leading to blurred vision at all distances. Each of these conditions affects vision differently and is distinct from the age-related changes associated with presbyopia.