Eye Procedures - A-Scan Ultrasound Biometry, B-Scan Ultrasonography, Corneal Pachymetry, Dilated Fundus Examination, Electrooculography (Paperback)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 27. Chapters: A-scan ultrasound biometry, B-scan ultrasonography, Corneal pachymetry, Dilated fundus examination, Electrooculography, Electroretinography, Eye examination, Farnsworth Lantern Test, Fluorescein angiography, Hirschberg test, Lea test, Ocular tonometry, Ophthalmoscopy, Optical coherence tomography, Optokinetic drum, Retinal gene therapy using lentiviral vectors, Retinoscopy, Retrobulbar block, Schirmer's test, Seidel test, Vision restoration therapy, Vision therapy. Excerpt: Optical coherence tomography (OCT) is an optical signal acquisition and processing method. It captures micrometer-resolution, three-dimensional images from within optical scattering media (e.g., biological tissue). Optical coherence tomography is an interferometric technique, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium. Confocal microscopy, another similar technique, typically penetrates less deeply into the sample. Depending on the properties of the light source (superluminescent diodes, ultrashort pulsed lasers and supercontinuum lasers have been employed), optical coherence tomography has achieved sub-micrometer resolution (with very wide-spectrum sources emitting over a 100 nm wavelength range). Optical coherence tomography is one of a class of optical tomographic techniques. A relatively recent implementation of optical coherence tomography, frequency-domain optical coherence tomography, provides advantages in signal-to-noise ratio, permitting faster signal acquisition. Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in ophthalmology where it can be used to obtain detailed images from within the retina. Recently it has also begun to be used...