Patients should see their doctor for a comprehensive eye exam every year. Children should have regular tests to ensure the proper development of their vision and prevent any interference with academic achievements. Older adults are often at a higher risk for eye conditions such as glaucoma, macular degeneration and cataracts. Even if eyes are healthy, a regular eye exam will provide the doctor with an ability to view the blood vessels of the eye. With information obtained during an examination of the eyes, physicians have been able to detect chronic conditions such as high cholesterol, diabetes and high blood pressure. The early detection of these conditions can lead to early treatment.