declines steadily starting at the age of 20 and rapidly after the age of 60.

Question

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Acuity refers to the sharpness or clarity of vision. It is well known that acuity declines steadily starting at the age of 20 and rapidly after the age of 60 due to changes in the lens and other parts of the eye. Light adaptation and dark adaptation refer to the ability of the eye to adjust to changes in lighting conditions. Retinopathy is a disease that affects the retina, and typically does not cause a decline in acuity until later stages of the disease.

Declines Steadily Starting at the Age of 20 and Rapidly