This includes looking at the eyelids, the cornea or clear “window” front part of your eye, the iris or round colored part of your eye, and the lens, which is a major part of the eye giving it the ability to focus. Next, the eye doctor may use a special microscope called a slit lamp to examine the front of your eyes. ![]() This can be important for determining whether the visual pathways for each eye are working properly. In addition, eye doctors will examine your pupils’ responses to light prior to dilation. ![]() One of the first parts of a comprehensive eye exam is a test of your vision, and perhaps a measurement to determine an eyeglass prescription, both of which require that your eyes remain undilated. Seeing the optic nerve is a crucial part of a comprehensive eye examination.īoth dilated and undilated eye exams provide important information to an eye doctor. 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. During an eye exam, a doctor will administer eye drops to increase the size of a patient’s pupils. Under normal circumstances, pupils can dilate to let in more light or in response to a variety of stimuli. Pupil dilation occurs when the opening in the center of your iris grows bigger to let in more light. ![]() The exam is critical to preventing and treating eye conditions that could potentially lead to vision loss. 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.
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