Why does eyesight tend to get worse with age? and why does this worsening eventually plateau?

Question

Why does eyesight tend to get worse with age? and why does this worsening eventually plateau?

In: 8

Answer 1

Not an expert on this, yet two possible reasons come to my mind: The flexibility of the lens decreases over time, so certain distances can get out of focus. Some might get a cataract at higher age – which is basically the lens getting cloudy – due to e.g. exposure to UV light.