Why Are Eye Exams Important?

Regardless of your age or physical health, it is important for everyone to have regular eye exams.

When an eye doctor examines your eyes, he or she is doing more than checking to see if you need glasses. During a complete eye exam, your eye doctor will not only determine your prescription for eyeglasses or contact lenses, but will also check your eyes for common eye diseases, assess how your eyes work together as a team and evaluate your eyes as an indicator of your overall health.

Eye examinations are an important part of health maintenance for everyone. Adults should have their eyes tested to keep their prescriptions current and to check for early signs of eye disease. For children, eye exams can play an important role in normal development. [Read more about eye exams for children.]

Vision is closely linked to the learning process. Children who have trouble seeing or interpreting what they see will often have trouble with their schoolwork. Many times, children will not complain of vision problems simply because they don't know what "normal" vision looks like. If your child performs poorly at school or exhibits a reading or learning disability, be sure to have his eyes examined to rule out an underlying visual cause.

In addition to evaluating your eyes for glasses and contacts, your eye doctor will check your eyes for eye diseases and other problems that could lead to vision loss. Here are some examples of the conditions that your eye doctor will be looking for:

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• Refractive Error: This refers to your prescription, including nearsightedness, farsightedness and astigmatism. Refractive error is corrected with eyeglasses, contacts or refractive surgery.
   
• Amblyopia: This occurs when the eyes are turned or when one eye has a much different prescription than the other. The brain will "shut off" the image from the turned or blurry eye. When left untreated, amblyopia can stunt the visual development of the affected eye, resulting in permanent vision impairment. Amblyopia is often treated by patching the stronger eye for periods of time.
   
• Strabismus: Strabismus is defined as crossed or turned eyes. The examiner will check your eyes' alignment to be sure that they are working together. Strabismus causes problems with depth perception and can lead to amblyopia.
   
• Eye Diseases: Many eye diseases, such as glaucoma and diabetic eye disease, have no symptoms in their early stages. Your eye doctor will check the health of your eyes inside and out for signs of early problems. In most cases, early detection and treatment of eye diseases can help reduce your risk for permanent vision loss.
   
• Other Diseases: Eye doctors can detect early signs of some conditions and diseases by looking at your eye's blood vessels, retina and so forth. Your eye doctor may be able to tell you if you are developing high blood pressure, high cholesterol or a few other problems.
   
  For example, diabetes can cause small blood vessel leaks or bleeding in the eye, as well as swelling of the macula, which can lead to vision loss. Your eye doctor will likely detect this during a complete eye exam. It is estimated that one-third of Americans who have diabetes don't know it; your eye doctor may detect the disease before your primary care physician does, especially if you're overdue for a physical.
   

Vision screenings are general eye tests that are meant to help identify people who are at risk for vision problems. These are the brief vision tests performed by the school nurse, the pediatrician or screeners in the workplace.

The eye test that you take when you get your driver's license renewed is another example of a vision screening.

Vision screenings are useful tools for identifying potential vision problems. Depending on who is performing the test and where the test is given, vision screenings may include tests for blur, muscle coordination and/or common eye diseases. A vision screening can indicate that you need to get an eye exam, but it does not serve as a substitute for a comprehensive eye exam.

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A comprehensive eye examination is performed by an eye doctor and will involve careful testing of all aspects of your vision. Based upon the results of your exam, the eye doctor will then recommend a treatment plan for your individual needs. Remember, only an eye doctor can provide a comprehensive eye exam — most family physicians and pediatricians are not fully trained to do this, and studies have shown that they can miss important vision problems that require treatment.

Treatment plans can include glasses or contact lenses for blur, eye exercises or surgery for muscle problems, medical treatment for eye disease or simply a recommendation that you have your eyes examined again in another couple of years!

No matter who you are, regular eye exams are important for seeing more clearly, learning more easily and preserving your vision for life.