system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how does eyesight/hearing deteriorate overtime?

What outside factors cause deterioration for the eyesight or hearing? Prolonged exposure to certain visual displays? Unprotected ears around highly noise polluted areas?
gpt
Too much ultraviolet light exposure on your eye over a lifetime causes the crystalline lens behind your iris and pupil to cloud up, causing cataracts. Cataract removal surgery is the most common surgery where they replace the clouded lens with a man-made one.

Excessive light exposure can also cause age-related macular degeneration (AMD) where your eye doesn't fully recycle some of the components it needs to sense light. This ends up accumulating and prevents the light sensitive part of your eye from properly receiving nutrients, causing loss of vision.

Typically these eye issues occur with age (usually greater than 60 years old).

Hearing is similar. Tiny specialized hairs in your ear act as tiny tuning forks that vibrate to sound. This is your sense of hearing. Excessive noise or just a lifetime of noise will wear them out, causing hearing loss. These hairs cannot regenerate.

Remember you only get one set of eyes and ears so make sure to protect them!