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Nearsightedness is a condition in which nearby objects appear clearer than distant objects.
Farsightedness is a condition in which distant objects seem clearer than nearby objects. Astigmatism is a condition that makes both near and distant objects seem blurred. Presbyopia refers to the loss of focusing ability that occurs in everyone with age. Symptoms usually begin when a person is in their early 40s. People who have never worn glasses begin needing glasses for reading.