The function of the eye’s retina can be compared to film in a camera – it sends light rays and raw sensory information to the brain via the optic nerve. These electric signals are then translated into vibrant and colorful images, or what we call “sight.”
The retinal membrane covers the inside of the back of the eye. In it are light-sensitive nerve cells called rods, and cones, which discern both light and color. Damage or disease in the retina can lead to impaired vision and in some cases, blindness.
What to Expect
First your retina specialist will take your medical history and create your patient record. It is a good idea to bring a list of any medications you are currently taking. You should also bring a pair of sunglasses, since you will have your eyes dilated. We also recommend that you have someone drive you to your appointment, because the pupil dilation will make it hard for you to focus and affect your ability to drive.
During the actual exam, your doctor will conduct a few different tests. The length of the appointment is typically 2-3 hours. Some of the diagnostic tests performed include the following:
- Binocular Indirect Ophthalmoscopy: This gives your doctor a comprehensive view of the internal structures of your eyes. A small handheld lens and a light attached to a headband are used to examine the inside of your eye and get a peripheral view of the retina.
- Visual Field Testing: During this test, you will be asked to focus on a point straight ahead. Then, flashes of light are displayed on a screen and you press a button whenever you see one of the flashes. A computer records the results, constructing a virtual map of your visual field. Your doctor will look for “blind spots,” which are a potential sign of retinal disease.
- Fundus Photography: Before this procedure, your pupils are dilated to prevent them from constricting. A special camera mounted to a microscope is used to capture images of the eye’s internal structures. While the pictures are being taken, you will see a series of bright flashes. These images help document any retinal abnormalities, as well as monitor treatment. The entire process takes five to ten minutes.
After the Exam
Following your retina exam, your doctor will discuss the results with you. He or she will determine if further testing is necessary, or if a diagnosis has been established. After explaining your treatment options, your doctor will address any questions you may have and make recommendations for future care.
Early detection and comprehensive care are vital to your optical health, and we are dedicated to providing both for our patients. If you live in or around Tulsa please do not hesitate to call us if you have any questions about your retina exam.