Optical Coherence Tomography (OCT) Triton 3D Eye scanner
Fiona Watt Optometrists invested in its first OCT (Optical Coherence Tomography) machine back in 2001. Now, on its third and most updated version, the practice is equipped with the DRI OCT Triton Swept Source 3D eye scanner; the latest milestone in retinal and choroidal imaging. The first generation machines only allowed the practitioner to look closely at the macula area (central retina). With the latest edition, we are now able to visualise different areas within the retina including the optic disc. This technology allows us to diagnose, monitor and refer for treatment of many other ocular conditions such as macular degeneration, glaucoma, macular hole, macular pucker, macula oedema, central serous retinopathy, diabetic retinopathy, optic nerve disorders, and vitreous traction.
Journey To A Clearer Future
What is an Optical Computer Tomography (OCT Digital Scans)?
An Optical Computer Tomography is a device that acquires detailed images and scans of the structure of the eye. Our Heidelberg Spectralis OCT contains different enhanced ‘modules’ and lenses which we are constantly upgrading to provide the best and most comprehensive eye health exam. OCT scans are non-invasive and safe for all ages to repeat regularly.
OCT is a procedure that uses light waves to produce a cross-sectional or three dimensional image of the retina in a non-invasive manner providing important information on the state of the eyes. The image produced shows all ten layers of the retina and provides important data that can help in the diagnosis of retinal ocular conditions. The information received also helps in determining routes of treatment specific to the diagnosed condition. The best part about the whole process is that the optometrist will have 3D images instantly and will be able to interpret and discuss the results immediately, concluding whether to monitor in practice or refer for treatment if necessary. Trend analysis allows the optometrists to compare your existing data to the new captured data so eye conditions can be closely monitored.
Swept source refers to the type of laser incorporated into the OCT device. The wavelength is centred at approximately 1nm, the laser actually changes, because it sweeps across a narrow band of wavelengths with each scan. The major advantages of Swept source OCT are:
- High imaging speed, which allows high-resolution images to be obtained while reducing the negative effect of patient’s eye movements on scan quality.
- An invisible light source is used, which is less distracting for patients compared to the visible light used in SD-OCT.
- Obtains clear images of deeper ocular structures
- Less light scattering by lens opacities
- Provides uniform sensitivity over the entire scan, which enables the vitreous, retina and deeper ocular structures to be visualised in a single scan
Our OCT is incorporate with additional modules:
- Swept Source OCT Angiography is a novel and non-invasive imaging technique to visualize the microvascular network. This offers non-invasive observation of the microvascular structures reducing the need for conventional ﬂuorescein angiography.
- Anterior segment imaging allows the measurement of corneal thickness and anterior chamber angles.
- Line scan is particularly useful when investigating lesions such as moles, naevi, melanomas and depth measurement. 12 radial images are rapidly captured of the target area. Allowing detailed understanding of a particular area.
When having an OCT scan at our practice, we will dilate your pupils to achieve better images of the retina. For this reason, we recommend you do not drive or operate any machinery for three to four hours afterwards and may find it helpful to wear sunglasses.