Optometry & Vision Science

Optical Coherence Tomography

Optical coherence tomography (OCT) is a non-invasive imaging test that uses light waves to take cross-section pictures of retina, the light-sensitive tissue lining the back of the eye. With OCT, each of the retina’s distinctive layers can be seen, allowing ophthalmologist to map and measure their thickness. These measurements help with diagnosis and provide treatment guidance for glaucoma and retinal diseases, such as age-related macular degeneration and diabetic eye disease. To prepare for an optical coherence tomography (OCT) exam, ophthalmologist may put dilating eye drops in the eyes in order to widen the pupil and make it easier to examine the retina. Patient will be seated in front of the OCT machine and will rest his/her head on a support to keep it motionless. The equipment will then scan their eye without touching it. Scanning takes about 5 to 10 minutes. If the eyes were dilated, they may be sensitive to light for several hours after the exam.