What do you need to know?
Optical coherence tomography is one of the state-of-the-art ophthalmological investigations that allows early diagnosis, targeted treatment and proper follow-up of a wide range of eye disorders. It provides a high-resolution, rapid and non-invasive analysis of ocular structures.
This device is currently the fastest in the world with 110,00 scans per second.
How does Ophthalmology OCT technology work?
The ophthalmological OCT works in a similar way to the classic ultrasound scanner, but instead of ultrasound, the device uses a light source that scans the eye structures and then records the light reflected from them. Image acquisition is very fast (a few seconds), the device emits infrared light, so the examination will not cause any discomfort. Usually, for such an investigation, you will be positioned in front of an eyepiece and you will be advised to fix a light spot inside the device without blinking or moving your eyes for a few seconds. During this time the device will capture an image which it will process automatically and quickly, so that you can benefit from the result immediately. The investigation does not require anesthesia and is completely painless. In order to obtain a good image resolution it is often necessary to administer drops that will dilate your pupils.
In which situations are Ophthalmology OCT investigations recommended?
Retinal OCT (retinal tomography) is the main method for exploring the macula (the central area of the retina where the image is formed) and is used in the diagnosis and follow-up of important ophthalmic diseases such as:
- age-related macular degeneration;
- macular edema of various causes (diabetic, post-traumatic, post-operative, from retinal vascular disease or central serous chorioretinitis);
- membranes on the retinal surface (vascular, inflammatory or cicatricial).
In all of these situations, OCT allows the tracking of the response to treatment by measuring with high precision parameters such as central retinal thickness.
Allows visualization of the retinal microvasculature through the SOCT angiography module. It is a non-invasive, dye-free technique that provides a clear image of the retinal blood circulation.
Ophthalmology OCT device now facilitates early diagnosis of glaucoma and assessment of its progression via optic nerve OCT (optic nerve tomography).
What values can be determined by the Ophthalmology OCT investigation?
The device measures the thickness of the nerve fiber layer in the papilla – the main factor that demonstrates glaucomatous damage. The investigation allows comparison of the values obtained between the two eyes and also between two separate examinations, helping the doctor to diagnose glaucoma even before visual field changes appear, or in the absence of high eye pressure.
Last but not least, anterior pole OCT is increasingly used in the management of narrow-angle glaucoma, because it can highlight details of the anterior chamber angle and also in corneal imaging – after retraction surgery or corneal transplantation.
Allows early detection of keratoconus through the topography module. Provides a detailed map of corneal curvature.
Allows measurement of the axial length of the eye needed for accurate biometry when it comes to lens shift.