Final answer:
Presbyopia is characterized by the loss of lens elasticity, which impedes the ability to focus on close objects, typically requiring the use of reading glasses for correction. The presence of lens opacities or pupil constriction might occur with aging but are not the primary signs of presbyopia.
Step-by-step explanation:
Age-related signs of presbyopia include reduced lid elasticity, lens opacities, and pupil constriction. However, the most relevant factor typically associated with presbyopia is the degradation of lens elasticity, which affects the eye's ability to focus on close objects. Tear film abnormalities are not a direct sign of presbyopia. Lens opacities refer to the development of cataracts, which can occur with aging but are distinct from the functional changes of presbyopia.
Presbyopia is a common vision problem associated with aging, where the lens becomes less elastic and the muscles that control the lens weaken. This loss of accommodation power in the lens leads to challenges with focusing on close objects. Those with presbyopia typically require corrective lenses such as reading glasses to improve close vision. Surgical procedures like LASIK can correct distant vision but would not eliminate the need for reading glasses because they do not restore the lens’s accommodation ability.