Optical Coherence Tomography uses technology that is best compared to ultrasound, except that it employs light rather than sound and thereby achieves clearer, sharper resolution. You may be given an OCT scan for a variety of reasons, including monitoring of the progress of your disease, verifying or discounting suspected swelling of the retina or checking OCT results against other results to determine the effectiveness of the current medication regime. Optical coherence tomography uses a laser light to sweep the retina and produce a high resolution image of the retina. No radiation or X-rays are used in this test, an OCT scan does not hurt and it is not uncomfortable. OCT uses rays of light to measure retinal thickness. With OCT, high-resolution cross-sectional or three-dimensional images of the internal retinal structure are generated by an optical beam being scanned across. OCT testing has become a standard of care for the assessment and treatment of most retinal conditions. The layers within the retina can be differentiated and retinal thickness can be measured to aid in the early detection and diagnosis of retinal diseases and conditions. Please consult your ophthalmologists for further details to assess whether OCT can facilitate the treatment of your eye condition.Optical Coherence Tomography is a noninvasive imaging technology used to obtain high resolution cross-sectional images of the retina. Overall, the development of OCT has greatly enhanced the quality care and management of many eye patients in a fast, non-invasive and reproducible way. Assessment of the surface of the lens in the eye and also that of intraocular lens after cataract surgery.LASIK) and many other corneal pathologies (e.g. Assessment of cornea diameter, cornea thickness, the cornea flap after corneal-refractive surgery (e.g.in narrow angle or occludable angle suspect). Assessment of the anterior chamber depth and angle, and monitoring of its change (e.g.Assessment of ganglion cell complex thickness at the macula, which can help diagnose glaucoma early.disc cupping in glaucomatous optic neuropathy, optic disc pit, disc drusens, etc. glaucomatous retinal nerve fibre damage and thinning. Time-domain optical coherence tomography (TD-OCT) impressed retina specialists but was soon left in the shade by spectral-domain OCT (SD-OCT), which offered. Retinal nerve fibre layer pathology: e.g.Retinal/ macular oedema secondary to retinovascular disease. The year after the OCT system was purchased, 692 diagnostic procedures were performed with a total cost of 325,695 an average of about 471 per test, or an. diabetic retinopathy and maculopathy, epiretinal membrane etc. full thickness/lamellar macular hole, macular detachment, macular schiasis, high myopic macular pathology, age-related macular degeneration, central serous chorioretinopathy, macular oedema, macular pucker etc. It can facilitate diagnosis, assessment and progress monitoring of many eye problems before and after treatment, including: Since its inception, OCT has helped ophthalmologists tremendously in understanding the pathology of many complicated retinal and optic nerve diseases. The latest high definition OCT systems, can analyse up to 5-7 microns resolution so the layered structures (of the retina, macula), the optic nerve and the anterior segment of the eye can be shown in greater detail. The anterior segment OCT system can analyse the cornea, iris, anterior segment angles and anterior part of the lens. In a non-invasive manner, posterior segment OCT system can analyse the layered structures of the retina (which is the photosensitive structure of our eyes, like the film in a camera) with a resolution of less than 10 microns axially and 20 microns transversely, similar to a super-microscope. Sensors will then detect the reflected light, after which the advanced computerised algorithm will analyse the reflected light (low-coherence interferometry) which has been changed in accordance with structural layers of the retina and its nerve fibre layer. A low energy pin-point near-infrared laser beam is projected and scanned across designated structures of the eye ball including the cornea, anterior segment and the back of the eye (retina) in a pre-defined pattern.
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