There are many signs that can signal vision loss. Early Diagnosis Is Important Vision changes like these could be early warning signs of eye disease. People over age 60 should have an eye exam through dilated pupils at least once a year. Usually, the earlier your problem is diagnosed, the better your chances of undergoing successful treatment and keeping your remaining vision. Regular dilated eye exams should be part of your routine health care. However, if you think your vision has recently changed, you should see your eye care professional as soon as possible. 
What are the symptoms of Low Vision ?