Dilation

Pupil dilation is performed to purposefully increase the size of the pupils during an eye exam so that the eye doctor can fully examine the health of the optic nerve and retina. The exam is critical to preventing and treating eye conditions that could potentially lead to vision loss.
Pupil dilation occurs when the opening in the center of your iris grows bigger to let in more light. Under normal circumstances, pupils can dilate to let in more light or in response to a variety of stimuli. During an eye exam, a doctor will administer eye drops to increase the size of a patient’s pupils. The eye is a beautiful organ, and it is the only place in the human body where a doctor can see a part of the central nervous system, the optic nerve. The observation of that nerve is a crucial part of a comprehensive eye examination. ”

Both the dilated and the undilated eye exams provide important information to an eye doctor. Let’s explore the undilated exam first.

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