Optical coherence tomography (OCT)
Our hospital-grade scan allows us to look deeper into your eyes than ever before. By creating a 3D view of your eye, we can help detect eye conditions up to four years than traditional imaging methods, including glaucoma, diabetic retinopathy and macular degeneration.
An optical coherence tomography scan (commonly referred to as an OCT scan) helps us to view the health of your eyes in greater detail, by allowing us to see what’s going on beneath the surface of the eye.
The scan creates a 3D cross-section view of your eye that shows us the layers and structures inside that wasn’t always possible to see with traditional imaging methods.
Imagine it like a cake – we can see the top of the cake and the icing, but the image produced from an OCT scan slices the cake in half and turns it on its side so we can see all the layers inside.
Our opticians can then map out and measure the thickness of these layers to get a clear idea of your eye health.
Traditional Fundus Test Image
OCT Scan Image
An OCT scan works in a similar way to MRI and ultrasound scans, using light waves to take around 1,000 images of the back of the eye and beyond, creating a 3D layered image of your eye.
The equipment uses a totally safe laser light source, without X-ray type radiation or puffs of air. You won’t feel any pain or come into contact with anything during the scan. What’s more, it only takes a few seconds.
Like with digital retinal photography, it’s really useful for your optician to have a ‘baseline’ image on file, so they can refer to it every time you see us – even if your vision and eye health are perfectly fine.
So the next time you come in for an eye test, your optician might spot even the tiniest change in the eye’s structures that could indicate the early signs of an eye health condition like glaucoma, diabetic retinopathy and macular degeneration before you have any symptoms.
At least 50% of sight loss is avoidable*, and generally speaking, the earlier we spot it, the better the chance of treating it and protecting your sight.
Optical coherence tomography, macular degeneration and glaucoma
OCT scanning is particularly useful for potentially sight-threatening conditions, like macular degeneration and glaucoma, that generally don’t have any symptoms until they start to have an impact on your vision.
We can already get a good idea of your eye health during an eye test when we take a photo of the back of your eye (digital retinal photography), but OCT can show us even more.
*Source: RNIB and Specsavers State of the Nation Report – Eye Health September 2016