Optical Coherence Tomography (OCT) is equivalent to an optical ultrasound. It takes a cross-section picture of your retina, the light-sensitive tissue lining at the back of the eye. It is an established and accurate technique to view the inside of a patients eye non invasively. The equipment reflects light waves into the patients eye and measures the distance it has travelled, collaborating the information to build up an image of the of the eye. Areas of the eye which reflect a lot of light back will create greater interference than areas that don't.
Put simply …if you imagine looking down on the top of a birthday cake all we see with a digital camera or a ophthalmoscope is the icing on the top of the cake. With 3D OCT it is like lifting a slice out of the cake and examining all the layers.

Why did we invest in it?

10 years ago the only practical way to examine the back of the eye was to use an ophthalmoscope and the view was limited. Then in 2003 we bought our first digital fundus camera, which takes images of the back of the eye and stores them on computer. The advantages over an ophthalmoscope were a better, wider image and a permanent record to compare the fine detail with the next time.

Our new 3D OCT not only takes more detailed, better images but also takes individual scans of the back of the eye, which are effectively cross-sections through the retina and show up the structures of the back of the eye in incredibly fine detail. It puts all the individual scans together to produce a three dimensional image of the retina which allows us to see and understand much better the very fine changes which can be indications of something going amiss. Thus allowing earlier, often more effective, treatment.

How long does it take and will it hurt?

During your appointment the optometrist will conduct the scan. It requires you to put your chin on a rest and look at a fixation light, keeping your eyes as still as you can. The scan takes 10 seconds per eye, and after a few minutes the results will be ready to view there in the test room. The test uses light to scan the eyes and so is totally painless.

Is it free?

OCT scans are not covered by the eye examination funded by the NHS and a separate charge has to be made for this service.

Will I benefit from this equipment?

We would encourage every patient to have regular scans, because it shows us in detail what your eye is like now and so it will help us to spot small but significant changes in the future. This is particularly useful for patients worried about Glaucoma, Macular Degeneration, and ‘flashes and floaters’.

If you would like to make an appointment for an OCT call us on 01938 553 180