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Branch retinal vein occlusion Cat Cataract: CLAPC/CLIPC Contact lens associated/induced papillary conjunctivitis CLARE Contact lens associated red eye CLPU Contact lens associated peripheral ulcer CNS Central nervous system CNV Choroidal neovascularization: CRAO Central retinal artery occlusion CRVO Central retinal vein occlusion CSR
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.
The Heidelberg Retinal Tomography is a diagnostic procedure used in ophthalmology. The Heidelberg Retina Tomograph (HRT) is an ophthalmological confocal point scanning laser ophthalmoscope [ 1 ] for examining the cornea and certain areas of the retina using different diagnostic modules (HRT retina, HRT cornea, HRT glaucoma).
OCT allows professionals to see the structures in the eye, usually the thickness of the retina and optic nerve. [11] This is a noninvasive procedure where patients rest their chin and focus on a green light within the machine. [11] Eye dryness and fatigue are the limited risks associated with this scan. [11]
In one reported patient with Macular telangiectasia type 1, a single intravitreal bevacizumab injection resulted in a marked increase in VA from 20/50 to 20/20, with significant and sustained decrease in both leakage on fluorescein angiography (FA) and cystoid macular edema on optical coherence tomography (OCT) up to 12 months. It is likely ...
If the view of the retina is not clear, imaging techniques such as ultrawide-field fundus photography, B-scan ultrasonography, and optical coherence tomography (OCT) may help to identify a detachment. [8] [13] [14] Fundus photography provides a detailed view of the back of the eye, potentially revealing retinal tears or breaks.
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.
A 6-second bolus injection of 2-5 cc of sodium fluorescein into a vein in the retina; Local injection; A series of black-and-white or digital photographs are taken of the retina before and after the fluorescein reaches the retinal circulation (approximately 10 seconds after injection).