NEUROLOGY
SURGERY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Polarimetry
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Laser scanning
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Light scanning polarimetry
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Laser scanning polarimetry
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Detailed explanation-1: -Scanning laser polarimetry assesses the retinal nerve fibre layer in the area surrounding the disc, an important indicator for glaucoma.
Detailed explanation-2: -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.
Detailed explanation-3: -RNFL thickness is measured on a cross-sectional retinal image sampled along a 3.4-mm diameter circle centered on the optic nerve head (ONH).
Detailed explanation-4: -GDx Nerve Fiber Analyzer (GDx) The GDx (short for Glaucoma Diagnosis) is a type of scanning laser polarimeter. The GDx uses a diode laser in the near infrared region to measure nerve fiber layer thickness and 65, 536 retinal points. The polarized light passes through the retinal nerve fiber layer.
Detailed explanation-5: -Scanning laser polarimetry. The scanning laser polarimetry (SLP) uses polarized light to measure the relative phase retardance of the RNFL.