The non-contact nature and high acquisition speeds of this new technology offer a wide range of quantitative and qualitative information. Recently, OCT is widely used in various ophthalmic diseases which affect retina of the eye, the angle of the eye, uvea (vascular middle layer of the eye) and cornea. The indications of Optic Coherence Tomography have increased during the past few decades. Indications of Optic Coherence Tomography OCT is also used to evaluate the conditions related to the optic nerve as a scan to observe changes to the fibres of the optic nerve. In recent times, Optic Coherence Tomography is used in graft assessment after corneal surgery. To check or compare OCT results against visual acuity. To check the effectiveness of the given medication regime. Your eye doctor may advise you for an Optical Coherence Tomography scan for a plethora of reasons which include:ĭiagnosis of various eye conditions like a macular hole, macular oedema, macular pucker, glaucoma, age-related macular degeneration, central serous retinopathy, vitreous traction, diabetic retinopathy, etc.ĭiscounting or verifying suspected retinal swelling. OCT scan in progress Uses of Optical Coherence Tomography Some part of this shining light is reflected by different eye tissues. It works by using interferometry which enables an ophthalmologist to image the tissue with the help of a beam of light directed into the eye. With this technology, an eye professional can take clear and detailed images of the various structures situated at the back of the eye including retina, optic nerve, macula, and choroid. Optical Coherence Tomography helps ophthalmologists to view the anatomical structures of the back of the eye. Optical Coherence Tomography during an Eye Examination It can be acquired in less than a minute. It is a non-contact scan and therefore it does not hurt nor does it make patients uncomfortable. In the OCT scan, no X-rays or radiations are used. This technology uses light rays to measure the thickness of the retinal tissues. Today, optical coherence tomography has become the most comfortable and standard procedure for the assessment, diagnosis, and treatment of several retinal and uveal conditions and glaucoma. Swept source OCT with OCT angiography machine This technology is especially useful in evaluation of patients with kidney disease who are not suitable for fluorescein dye injection. Since this technology does not involve injection of a dye, complications related to dye injection like anaphylaxis (severe allergic reaction), vomiting etc are totally obviated. Very few centres in the country have acquired OCT angiography, which is a no dye, no injection technology used to analyse blood flow in the retina and choroid. choroid (vascular layer of the eye) can be visualised. With the latest swept-source technology faster images can be obtained and even the structures behind the retina, ie. With the help of such sharper and clearer results, an ophthalmologist can detect and diagnose various retinal diseases and also emerging problems early. The retinal layers can be differentiated, and the thickness of the retina can be measured with optical coherence tomography. This technology provides images on the micron scale in real time. Optical Coherence Tomography (OCT) in ophthalmology is an emerging technology and is used to obtain high-resolution cross-sectional images of the nerve layer on the inside of the eye, the retina.
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