Optical coherence tomography – or OCT – is a medical imaging technique. It uses visible light to produce a 3-D image of what’s happening beneath the surface. MRI, CT-scans and X-rays use radiation for this. But this can pose health risks, especially if repeated.
OCT is more like ultrasound. It only uses visible light (rather than sound). As a result, it is safe to use as often as you like without risk to the eye’s delicate tissues. It also provides much higher resolution.
Some eye disorders cannot be seen with the naked eye. The normal view or photograph that happens in eye examination does not show what’s happening under the surface. To see what’s really going on, we use OCT. It allows us to image the underlying layers of the eye in a non-invasive way. This is invaluable for picking up problems with the retina and macula as well as diagnosing and monitoring the progress of progressive diseases such as glaucoma.