An optical coherence tomography (OCT) is a specialized scan that provides highly detailed cross-sectional images showing the retina and macula’s thickness, contour, and tissue layers. OCT uses light in the form of a laser to obtain high-resolution images. While both an OCT and visual field testing can detect moderate and late disease, only an OCT scan can detect early disease in patients, according to Glaucoma Today.

What Happens During an OCT?

Before your OCT, your ophthalmologist may dilate your eyes using eye drops. Dilating your eyes will widen your pupil, making it easier to examine your retina. You will then sit in from the OCT and put your head on a support to keep it motionless. At this point, the equipment will begin to scan your eye without touching it. This process takes around five to ten minutes. Keep in mind; if your eyes are dilated, they may be sensitive to light for a little while after.

Who Should Get an OCT Scan and What are the Risks?

Almost anyone can get an OCT scan, but you should especially get one if you have Multiple Sclerosis, Optic Neuritis, or other neurological diseases. You should not get an OCT scan if you have a history of glaucoma or any other eye disease. There are no anticipated health risks for an OCT scan.

What Conditions Can OCT Diagnose?

An OCT scan can help diagnose the following conditions:

• Vitreous traction
• Diabetic retinopathy
• Central serous retinopathy
• Glaucoma
• Age-related macular degeneration
• Macular edema
• Macular pucker
• Macular hole

OCT is regularly used to evaluate disorders of the optic nerve. OCT scans allow ophthalmologists to see if there are any changes to the optic nerve fibers. Since OCT scans rely on light waves, they cannot be used on patients with conditions that interfere with light passing through the eye. Conditions like cataracts or significant bleeding in the vitreous will make it difficult for you to get an OCT scan.

Schedule Your OCT Scan with a Professional Ophthalmologist

Dr. John DellaCroce is a board-certified ophthalmologist and fellowship-trained vitreoretinal microsurgeon who provides state-of-the-art, high-quality eye care to patients in Northwest Arkansas. Make an appointment at Retina Center of Arkansas for your next OCT scan.