What is an OCT?
Ocular Coherence Tomography (OCT) is an advanced eye scan for people of all ages. Similar to ultrasound, OCT uses light rather than sound waves to illustrate the different layers which make up the back of your eye. At Scott Gilmour Optometrists we have taken delivery of the latest Topcon DRI OCT Triton. Unlike conventional OCT the Triton's swept source uses a longer 1050nm wavelength allowing deeper penetration into the eye. This not only lets us see the retina in better detail, but also the vitreous, choroid and sclera structures like never before.
Using a 3D OCT camera we can take both a digital photograph and a three dimensional cross section in one sitting . This allows us to instantly diagnose a number of common conditions. The scan is non-invasive, painless, simple and quick. The information it gives us is invaluable picking up the most subtle changes to your retina. This gives you an invaluable ongoing record of the health and condition of your eyes.
What can the scan check for?
Glaucoma damages the optic nerve at the point where it leaves the eye. The danger with chronic glaucoma is that there is no pain and your eyesight will feel unchanged but your vision is being damaged. In many cases an OCT scan will be able to confirm the presence of this sight threatening disease before it could be detected in a regular optician’s sight test.
Age-related macular degeneration causes the gradual breakdown of the central area of the retina. This is the most common cause of vision loss in the over fifties. OCT can not only identify this condition and its type (there are two, wet or dry) it can also monitor progression. In some cases monitoring the eye’s improvement with treatment.
Diabetes is a major cause of visual impairment among adults. Here in the UK more than two million have been identified as having diabetes. OCT enables early detection which greatly improves the success rate of treatment.
Macular holes are small holes in the retina which effect the area of the eye responsible for sharp, detailed central vision, damage to this area can result in loss of vision.
Vitreous detachments are when the jelly inside our eyeball moves away from the back of our eye towards the centre, in some cases it does not detach and pulls against the retinal surface and this could result in a hole. An OCT would easily identify this problem but again your eyesight can seem unchanged even though damage to the back of your eye is occurring.