If children do not require vision correction, they should have their eyes tested every two years. But children who need to correct vision should have eye exams annually. Normally, if *****s do not have any problems with their eyes, they should have their eyes tested every 2~3 years. When at 40, should have a comprehensive eye exam, with follow-up eye exams every 2 years. Once reach the age of 70 and beyond, should have a comprehensive eye exam at least once a year.