Optical Coherence Tomography
Optical Coherence Tomography (OCT) is a non-contact imaging technique used to obtain a high resolution, cross-section view of the retina.
A light beam is projected onto the retina, which the retina reflects, and a specialised system electronically detects and processes echo patterns, which creates a cross-sectional image of the retina. Linear, area and volumetric measurements are also taken and displayed onto the monitor to be analysed by a specialist.
OCT is commonly used to evaluate vitroretinal disease (such as macular holes, macular oedema, age-related macular degeneration, epiretinal membranes) and glaucoma. This is done by:
- Examining the retina and retinal structures, such as the macula, retinal pigment epithelium, and retinal nerve fibre layer.
- Examining the extent of retinal defects or abnormalities caused by trauma or various eye diseases including, macular degeneration, retinal detachment, macular hole, macular oedema, and epiretinal membrane.
- Performing detailed measurements of the retina (such as thickness of the macula and its sub-layers) and the optic nerve head (such as volumetric and area measurements) to determine the specific causes of various eye disorders and develop the treatment plan, such as surgical intervention.
- Monitoring the outcomes of treatment procedures over time.