scanning laser polarimetry


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polarimetry, scanning laser (SLP) 

An instrument using polarized laser light (780nm) to determine the thickness of the retinal nerve fibre layer (RNFL) in the peripapillary area. It utilizes the birefringent properties of the RNFL, which produces a change in polarization (called retardation) of the light reflected by the RNFL. The degree of retardation is assumed to be proportional to the thickness of the RNFL. The instrument includes a means of neutralizing the birefringence of the anterior segment of the eye. A comparison of the retardation values of the RNFL is made with an age-matched normative database. The instrument is used to detect RNFL defects and progressive changes over time in glaucomatous eyes. See glaucoma detection.
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25 We thus deduce that better and accurate evaluation of RNFL-T with modern diagnostic modalities like enhanced corneal compensation algorithms of scanning laser polarimetry shows more thinning of RNFL in thin corneas, highlighting more glaucomatous damage.
Objectives: The presence of retinal nerve fiber layer (RNFL) split bundles was recently described in normal eyes scanned using scanning laser polarimetry and by histologic studies.
Studies using scanning laser polarimetry (SLP) have demonstrated that the axons originating from the optic disc form two bundles (superior and inferior).
13-14) Another objective method to assess the RNFL is through scanning laser polarimetry.
Cathering jui-ling Liu et al, evaluated the diagnostic sensitivity of Scanning Laser Polarimetry in primary angle closure glaucoma as compared with that in primary open angle glaucoma and to compare the Retinal Nerve Fibre Layer distribution between PACG and POAG.
The recent technological leap in automated, non-invasive, objective quantification of the structural parameters of the ONH coupled with visualisation and analysis of the retinal nerve fibre layer (RNFL) and ganglion cell layer (GCL) using techniques such as optical coherence tomography (OCT), scanning laser polarimetry (SLP) and confocal scanning laser ophthalmoscopy (cSLO) combined with studies suggesting that overreliance on SAP in early glaucoma may lead to underestimation of the amount of glaucomatous damage, has led to renewed interest in the structure-function relationship in glaucoma.
Analysis of the origin of atypical scanning laser polarimetry patterns by polarization-sensitive optical coherence tomography.
Spectral-domain optical coherence tomography and scanning laser polarimetry in glaucoma diagnosis.
They also include extensive articles on the basic principles and interpretation of imaging modalities such as flourescein angiography, indocyanine green angiography, optical coherence tomography, optical coherence tomographic ophthalmology, ultrasound, scanning laser tomography, scanning laser polarimetry, the retinal thickness analyzer, adaptive optics ophthalmoscopy, and imaging of ocular blood flow.
Scanning laser polarimetry (SLP), confocal scanning laser ophthalmoscopy (CSLO) and optical coherence tomography (OCT) make use of the different properties of light and the varied characteristics of retinal tissue to provide real-time, non-invasive and high-resolution images.

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