About this service
Optical coherence tomography (OCT) is a scan used to examine the layers of the retina. The retina is the light sensitive area at the back of the eye, equivalent to film in a camera.
An OCT takes 3D images of the layers of the retina which allow your retinal specialist to see the structures in the retina that may not be visible with direct examination.
- The OCT scan is very simple and just takes fifteen to twenty minutes.
- It is a completely non-contact test. There are no puffs of air or light flashes into your eyes.
- Your pupils will be dilated and so you can expect that your vision will be blurred for four to six hours afterwards.
- This scan may be used to diagnose certain eye conditions and to help plan treatment.
- As your pupils will have been dilated, your vision will be blurred for four to six hours afterwards.
- You should have someone ready to accompany you home.
- Do not drive after the scan.
- OCT scans may need to be repeated regularly to monitor response to treatments or changes in your eye condition.