Optical coherence tomography (OCT) scan
OCT allows your optician to identify subtle changes over time, such as changes in the vitreous (the jelly-like substance that fills the eye), the retina and the macula.
Working in a similar way to ultrasound, but using light waves instead of sound waves, OCT allows your optometrist to view the distinct layers of the retina.
By mapping and measuring the thickness of the retina’s layers, an OCT scan can detect the early signs of retinal eye conditions and diseases, earlier than standard examination techniques. That means it can diagnose eye health problems before you even notice symptoms.
Questions about tests your optician might use?
Last review date: 02 2022
Next review date: 12 2023
Free confidential advice and support
Call our helpline on 0300 3030 111
Lines are open 9am - 5pm Monday to FridayAbout the Macular Society Helpline