What Is Optical Coherence Tomography (OCT)? | Ophthalmology

Optical Coherence Tomography (OCT)

Overview of optical coherence tomography (OCT)

Optical Coherence Tomography (OCT) is a non-invasive diagnostic instrument used for imaging the retina. It is the technology for the future because it can enhance patient care. It has the ability to detect problems in the eye before any symptoms being present in the patient. With an OCT, doctors can see a cross-section or 3D image of the retina and detect the early onset of a variety of eye conditions and eye diseases such as macular degeneration, glaucoma and diabetic retinopathy.

Optical coherence tomography (OCT) can diagnose other diseases such as macular holes, hypertensive retinopathy, and optic nerve damage. The use of OCT allows early treatment in patients and dramatically improves the success of these treatments, especially in diseases such as wet macular degeneration.

Optical coherence tomography (OCT) has become the standard for the diagnosis and treatment of most diseases of the retina, similar to CT scans, which are used to paint the internal organs of the body. The OCT uses a range of light to scan the eye faster. These scans are described and the OCT shows an image of the retinal tissue layers. These layers can be separated and their thickness measured. By comparing the thickness of the membranes measured by an OCT scan with the normal thickness of healthy retinal membranes, ophthalmologists can determine if there is any retinal disease in the eye before the patient knows if there are any problems.

Eye examination and OCT

Patients and healthy research volunteers complete an eye exam to check the vision level and range of lateral vision. OCT is also done to take a detailed picture of the nerves and fibres in the eye. The test takes 45 minutes for the ophthalmologist to complete.

Optical coherence tomography (OCT) is a painless and non-invasive imaging technique that takes a detailed image of the retina at the back of the eye. The test involves sitting on a special machine with your chin supported. A special camera takes a picture of the retina and transmits it to a computer for evaluation by an ophthalmologist. The scan can take five minutes or less to complete.

Healthy research volunteers and patients were asked to complete ophthalmic evaluation and OCT twice over a period of 18 months.

OCT exam preparation

Dilating eye drops to widen your pupils

To prepare for the optical coherence tomography (OCT) test, your doctor may place dilating eye drops in your eyes to enlarge the pupil and make it easier to examine the retina.

After the pupils are dilated, the patient is seated in front of the OCT machine, the headrests on a support to keep it motionless.

The patient looks at the lens of the device with a small, bright objective, the devices scan without touching the eye.

The optical coherence tomography (OCT) test was completed in seconds. If your eyes are wide apart, they may be sensitive to light for several hours after the test.

Detailed diagnosis

Treatment and monitoring of your retinal disease

Optical coherence tomography technology provides excellent components for examining the retinal interface in vitro, as it helps to identify retinal pathologies and retinal edemas.

It uses the OCT data to monitor disease progression, and with it, your doctor can determine if treatment is necessary.

It also enables your eye doctor to tell whether or not retinal therapies such as laser or eye injections are decreasing the fluid or edema in the retina.

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