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  2. Boots Opticians - Wikipedia

    en.wikipedia.org/wiki/Boots_Opticians

    All of Boots Opticians' laser eye surgeries were bought by Optical Express in late 2004. [ citation needed ] On 29 January 2009, it was announced that Boots Opticians were to merge with Dollond & Aitchison , forming a chain of 690 stores and 5,000 staff after Boots purchased a controlling share in D&A. [ 5 ] [ 6 ] In May 2019, the company was ...

  3. Optical coherence tomography angiography - Wikipedia

    en.wikipedia.org/wiki/Optical_Coherence...

    A short scan time prevents too much patient movement during signal acquisition. With the development of Fourier-domain OCT, spectral-domain OCT, and swept source signal acquisition time was greatly improved making OCTA possible. [40] OCTA scan time is now around three seconds, however, saccadic eye movement still causes a low signal-to-noise ratio.

  4. Optical coherence tomography - Wikipedia

    en.wikipedia.org/wiki/Optical_coherence_tomography

    Ocular OCT retinal thickness map, right eye Time-domain OCT of the macular area of a retina at 800 nm, axial resolution 3 μm Spectral-domain OCT macula cross-section scan. Optical coherence tomography (OCT) is a technique for obtaining sub-surface images of translucent or opaque materials at a resolution equivalent to a low-power microscope.

  5. Speckle variance optical coherence tomography - Wikipedia

    en.wikipedia.org/wiki/Speckle_variance_optical...

    Optical coherence tomography is an imaging modality that uses low-coherence interferometry to obtain high resolution, depth-resolved volumetric images. OCT can be used to capture functional images of blood flow, a technique known as optical coherence tomography angiography (OCT-A). SV-OCT is one method for OCT-A that uses the variance of ...

  6. Doppler optical coherence tomography - Wikipedia

    en.wikipedia.org/wiki/Doppler_optical_coherence...

    Doppler Optical Coherence Tomography is an extension of OCT, where it combines the Doppler effect principle to achieve high resolution tomographic images in biological tissues. And because of its high resolution and velocity sensitivity, there are many applications in the medical field. The basic phenomenon of Doppler OCT can be explained below.

  7. Spectroscopic optical coherence tomography - Wikipedia

    en.wikipedia.org/wiki/Spectroscopic_optical...

    Spectroscopic optical coherence tomography (SOCT) is an optical imaging and sensing technique, which provides localized spectroscopic information of a sample based on the principles of optical coherence tomography (OCT) and low coherence interferometry. The general principles behind SOCT arise from the large optical bandwidths involved in OCT ...