Whether eye dilation during an exam is necessary depends on the reason for your exam, your age, your overall health and your risk of eye diseases.
The eye drops used for dilation cause your pupils to widen, allowing in more light and giving your doctor a better view of the back of your eye. Eye dilation assists your doctor in diagnosing common diseases and conditions, possibly at their earliest stages. They include:
Eye dilation also makes your vision blurry and your eyes more light sensitive, which, for a few hours, can affect your ability to drive or work. So if eye dilation is greatly inconvenient, ask your doctor about arranging another appointment. Alternatives to dilation are available, but they aren't as effective for allowing a careful examination of the back of your eye.
In determining whether eye dilation is necessary for you, your eye doctor may consider:
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