Optovue Anterior Segment Oct? 183 Most Correct Answers

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Lecture: Anterior Segment OCT

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What can be diagnosed with OCT-A?

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OCT-A gives insight into small changes to the blood vessel network before they develop, making it particularly useful for early diagnosis and monitoring of retinal eye diseases, including glaucoma, macular degeneration, choroidal neovascularization, diabetes, vein occlusions and optic neuropathies.

What conditions can an OCT scan detect?

What is an OCT scan used for and what conditions can it help to…
  • Glaucoma.
  • Diabetic retinopathy.
  • Detached retina.
  • Age-related macular degeneration.
  • Macular hole.

What is OCT A used for?

Optical coherence tomography angiography (OCT-A) has emerged as a non-invasive technique for imaging the microvasculature of the retina and the choroid. The first clinical studies using this innovative technology were published in 2014 .

Why do I need an OCT scan?

If you are over age 25, or at risk of developing ocular disease, your eye doctor may recommend an OCT exam as part of your annual eye exam. Having regular OCT scans will enable your doctor to compare the images from previous years to detect any abnormalities or thickening of retinal layers.

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How do you interpret OCT A?

When interpreting OCTA images, the easiest way to detect projection artifacts is to compare en face flow with the corresponding B-scan. On B-scan, projections artifacts appear as “tails” arising from overlying vessels and should not be interpreted as true flow (Fig. 1f).

What is Anterior Segment OCT used for?

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Anterior segment OCT (AS-OCT) enables the precise visualization of anterior segment structure; thus, it can be used in various corneal and ocular surface disorders.

What is the function of the anterior segment?

The front part of the eye is called the anterior segment. Its main function is to focus the rays of light that penetrate the eye on the retina. It encompasses the most superficial and transparent part of the eye, the cornea and the crystalline lens, our eye’s natural lens that helps us to focus objects.

What is the difference between anterior and posterior segment OCT?

Anterior segment OCT utilizes higher wavelength light than traditional posterior segment OCT. This higher wavelength light results in greater absorption and less penetration. In this fashion, images of the anterior segment (cornea, anterior chamber, iris and angle) can be visualized.

Why do they test for OCT in eyes?

Healthcare providers use OCT to diagnose and manage several conditions that affect the eyes, including: Glaucoma: If you have glaucoma, fluid and pressure build up in your eye and damage your optic nerve. Age-related macular degeneration: People may lose central vision with this condition.

What is anterior segment imaging?

Anterior segment imaging allows for an objective method of visualizing the anterior segment angle. Two of the most commonly used devices for anterior segment imaging include the anterior segment optical coherence tomography (AS-OCT) and the ultrasound biomicroscopy (UBM).

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How do you interpret an OCT image?

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Interpretation of the OCT image requires understanding that the image was based on light waves. Thus, the image is subject to the characteristics of light waves, and one can see reflections, attenuations, interfaces, and shadows in the image due to this property of light.

How do you describe an OCT scan?

Optical coherence tomography (OCT) is an optical analog of ultrasound imaging that uses low coherence interferometry to produce cross-sectional images of the retina. It captures optical scattering from the tissue to decode spatial details of tissue microstructures.

How do you read OCT glaucoma?

OCT scans of the macula involve a strategy of six intersecting lines that intersect at the foveal center. Assessment of the macular region in glaucoma is necessary because over 50% of retinal ganglion cells lie in the macular region and hence it is the ideal region to detect early cell loss.

What does glaucoma look like on a OCT scan?

An OCT test is taken at the patient’s initial exam and then every 6 to 12 months after. Thinning of the optic nerve indicates that it is being damaged by elevated intraocular pressure. When OCT test results show that the optic nerve is thinning, this is a symptom of glaucoma.

What does red mean on an OCT scan?

Red disease is when the OCT mistakenly indicates that something is abnormal; green disease is when the OCT data shows no sign of abnormality, but the eye is, in fact, in trouble.

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What is the difference between anterior and posterior segment OCT?

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Anterior segment OCT utilizes higher wavelength light than traditional posterior segment OCT. This higher wavelength light results in greater absorption and less penetration. In this fashion, images of the anterior segment (cornea, anterior chamber, iris and angle) can be visualized.

What is Anterior Segment OCT used for?

Anterior segment OCT (AS-OCT) enables the precise visualization of anterior segment structure; thus, it can be used in various corneal and ocular surface disorders.

What is posterior segment OCT?

Intraoperative optical coherence tomography (OCT) of the posterior segment is a relatively new application of a familiar imaging modality that promises to improve surgeons’ ability to visualize intraocular structures and to provide qualitative and quantitative information that has previously not been available during …

What are the different types of OCT?

Two types of OCT are in common use, time-domain (TD-OCT) and Fourier-domain (FD-OCT).

What is posterior segment?

The posterior segment of the eye comprises the back two-thirds of the eye, including the vitreous humor, the retina, the choroid and the optic nerve.

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