Vision Plans cover examinations for eye conditions and refractive errors through a thorough eye exam. Normally, a value of 20/20 is considered to be optimum, or perfect vision. Individuals who have 20/20 vision are able to read letters that are 3/8 of an inch tall from 20 feet away. If you don’t have 20/20 vision, you have what is called a refractive error. A refractive error means that the light is not bending properly when it passes through the lens of your eye. The refraction test will tell your doctor what prescription lens you should use in order to have 20/20 vision. If you are experiencing eye pain, eye redness or sudden blurry vision then you will be seen as a medical visit Medical screening for diabetes and high blood pressure patients are also seen as medical exams Medical Insurance covers eye exams for patients who are experiencing symptoms or who have health conditions such as diabetes.  These exams are more in-depth and require communication with your primary care doctor and/or subspecialists. Medical eye exams allow for multiple visits and diagnostic testing but generally do not cover refractions for eyeglass or contact lenses. If you have diabetes you should have an eye examination every year  or if instructed,  follow the schedule that your doctor specifically set up for you. A number of eye conditions are associated with diabetes, such as diabetic retinopathy and glaucoma. According to the American Diabetes Association, people with diabetes are at a greater risk for blindness than other Americans