Optical coherence tomography (OCT) is a noninvasive imaging technology used to obtain high-resolution cross-sectional images of theretina.
OCT is similar to ultrasound testing, except that imaging is performed by measuring light rather than sound.
OCT measures the retinal nerve fiber layer thickness inglaucomaand other diseases of the optic nerve.
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This article explains how OCT works and its uses in diagnosing conditions of the eye.
During an eye examination, optometrists and ophthalmologists can view the back of the eye and its anatomy.
Some describe OCT as an optical ultrasound because it provides cross-sectional images.
OCT can also be used to track the healing or resolution of that swelling.
Images are built based on these reflections.
OCT images to approximately 2 to 3 millimeters below the surface of the tissue.
Images are obtained clearly through a transparent window, such as the cornea.
The light that is emitted into the eye is safe, so no damage will occur.
What To Expect During Optical Coherence Tomography
OCT takes only a few minutes to perform.
What Can an OCT Scan Detect?
OCT obtains images by measuring light instead of sound.
The test takes five to 10 minutes and can be used to evaluate many eye conditions.
In: Bille JF, ed.High Resolution Imaging in Microscopy and Ophthalmology.
2021;35(1):236-243. doi:10.1038/s41433-020-01263-6
American Academy of Ophthalmology.What is optical coherence tomography?
