High Definition Optical Coherence Tomography
Optical Coherence Tomography (or OCT), is a highly sophisticated echo technique similar in principle to an ultrasound or MRI scan; it however utilises reflections of light instead of sound or radio waves. OCT produces highly detailed, three-dimensional, cross sectional views of structures within the eye. It provides tissue morphology imagery with a resolution of 1µm, meaning the optometrist is able to view individual layers of the eyes anatomy fractions of a millimeter in size. This is hugely beneficial in screening, diagnosing and monitoring various eye conditions such as macular degeneration and glaucoma.
At Peter Ivins Eye Care we utilise the latest and most technologically advanced, high definition Zeiss Cirrus 3D HD-OCT from Carl Zeiss. This enables accurate cross sectional imaging of the cornea; important in monitoring corneal disease. Imaging of the iris, anterior chamber and crystalline lens; important in diagnosing certain types of glaucoma and disorders of the front of the eye. Accurate imaging and analysis of the macula; essential in diagnosing and monitoring diseases of the macula such as dry macular degeneration, wet macular degeneration, macular holes and diabetic maculopathy. And detailed imaging and analysis of the optic nerve; indispensable in diagnosing and monitoring diseases of the optic nerve such as glaucoma, optic neuritis and raised intracranial pressure.
The process is quick and painless, taking a few seconds per scan. On average 2-4 scans of each eye will be recorded and stored to establish a baseline for future comparisons. Baseline OCT scans are recommended on all over 40 year olds and are ideally repeated at 6-12 monthly intervals. The technique does not often require the use of eye drops and does not affect vision, meaning driving afterwards is safe.