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What percentage of 60 year olds have 20/20 vision?

It is widely reported that only about 35% of all adults have 20/20 vision without any form of correction, but this statistic does not hold true as we age. Significant physiological changes impact vision clarity, raising the question: **What percentage of 60 year olds have 20/20 vision?** The answer is far lower, and understanding why can help you protect your sight.