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Optical coherence tomography helps diagnose, treat and manage the eye diseases that are the leading causes of blindness.

Diabetic macular edema: In people with diabetes, blood vessels in the retina can become leaky. This causes swelling in a part of the retina called the macula.

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by F Zernike · 1934 · Cited by 450 — F. Zernike, F.J.M. Stratton; Diffraction Theory of the Knife-Edge Test and its Improved Form, The Phase-Contrast Method, Monthly Notices of the Royal Astro.

OCT of the eye is noninvasive, meaning it does not enter or even touch the eye. Standard OCT uses invisible infrared light, so it is more comfortable than imaging that uses visible light.

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Optical coherence tomography creates highly precise 3D images. It is most commonly used to image the retina in the back of the eye.

Diabetic retinopathy: If people with diabetes have excess blood sugar over a long time, it can damage the retina and its blood vessels.

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OCT scans a beam of light to create 3D images that show the retina’s layers in microscopic detail. OCT can also image the optic nerve, which connects the eye to the brain.

A pixel is the part of a sensor which collects photons so they can be converted into photoelectrons. Multiple pixels cover the surface of the sensor so that ...

OCT is a common eye care test. It is used when you may be at risk for eye disease or when you already have an eye condition.

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Slit spacing. A diffraction grating is made of many slits. If there are 1000 slits per metre, then slit spacing is 1/1000 ...

Cornea disease: The cornea is the clear front window of the eye. Damage to the cornea can make vision cloudy or out of focus.

What can anOCTscan detect

For an ideal objective lens, the incident electron probe simply forms an Airy disk in the back focal plane of the lens. This disk is the Fourier transform of ...

OCT was co-invented by David Huang, an OHSU ophthalmologist and biomedical engineer. It’s now a standard test for finding conditions that can cause vision loss, often before patients notice symptoms. OCT is used in more than 30 million eye procedures each year.

Bandpass filters are a crucial component in many optical devices, providing a means of filtering out undesired wavelengths of light.

Eye disease in babies: Babies born before the 37th week of pregnancy or at a very low weight are at risk for a condition called retinopathy of prematurity. This happens when abnormal blood vessels grow in the retina.

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Glaucoma: Glaucoma damages the optic nerve, which connects the eye to the brain. It commonly causes loss of peripheral vision.

The OHSU Casey Eye Institute is a leader in developing noninvasive imaging to help prevent vision loss. Dr. Huang, our associate director and director of research, is known worldwide for his vision research and inventions. He holds 42 patents and has won top prizes in vision research and biomedical engineering.

Macular degeneration: In age-related macular degeneration, a part of the retina called the macula is damaged, causing loss of central vision.

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Light can be described as an electromagnetic wave traveling through space. For purposes of ellipsometry, it is adequate to discuss the waves's electric field ...

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