How does aging generally affect corneal sensitivity?

With advancing age, there is a well-documented decrease in corneal sensitivity. This decline in sensitivity is largely attributed to age-related changes in the cornea itself and the associated neural pathways. As individuals age, there tends to be a reduction in the number of nerve fibers innervating the cornea, which leads to diminished sensitivity. The changes may also involve alterations in both the corneal epithelium and the stromal layers, impacting how the cornea responds to stimuli.

Additionally, the aging process can lead to a variety of factors such as dryness, decreased tear production, and changes in the sensory function of the nerves, all contributing to reduced sensitivity. This reduced sensitivity may make older adults less aware of potential discomfort or damage to the cornea, which also emphasizes the importance of regular eye examinations as one ages. Understanding these changes is crucial for managing older patients, especially in relation to corneal health and the risk of complications.