Dilation and Refraction: Explained
Dilation and refraction are two common procedures you may encounter during your appointment. Dilation allows your eye doctor to get a better view of the back of your eye and is included as part of a comprehensive eye exam. Refraction helps determine your prescription for glasses or contact lenses and is typically not covered by medical insurance but may be covered by a vision insurance plan. Understanding these procedures can help you prepare for your appointment and be aware of any additional costs you may incur.
Dilation:
Dilation is a procedure where your ophthalmologist or optometrist puts drops in your eyes to dilate or widen your pupils. This allows them to get a better view of your retina, optic nerve, and other structures at the back of your eye. During dilation, your vision may be blurry, and your eyes may be more sensitive to light for a few hours.
Dilation is included as part of a comprehensive eye exam, and insurance plans cover it as a preventive service.
Refraction:
Refraction is a procedure that measures how light bends as it passes through your eye. Your ophthalmologist or optometrist will use a special instrument called a phoropter to present different lenses and ask you which one makes your vision clearer. This process helps determine your prescription for glasses or contact lenses. Refraction is a routine part of most eye exams and is painless and non-invasive.
It is important to note that while refraction is an essential part of determining your vision needs, it is typically not covered by medical insurance. Most vision insurance plans cover the cost of refraction, but you may be responsible for a co-pay or co-insurance if you have a medical insurance plan or are seen for a medical diagnosis such as cataracts, diabetes, dry eyes, etc.