Optical coherence tomography (OCT) is a non-invasive imaging test. OCT uses light waves to take cross-section pictures of your retina.

With OCT, your ophthalmologist can see each of the retina’s distinctive layers.  This allows your ophthalmologist to map and measure their thickness. These measurements help with diagnosis. They also provide treatment guidance for glaucoma and diseases of the retina. These retinal diseases include age-related macular degeneration (AMD) and diabetic eye disease.

To prepare the patientfor an OCT exam, the ophthalmologist may put dilating eye drops in patient’s eyes. The patient will sit in front of the OCT machine and rest hishead on a support to keep it motionless. The equipment will then scan the eye without touching it. Scanning takes about 5 – 10 minutes.