C K Brinkmann1. 1. Universitäts-Augenklinik Bonn, Ernst-Abbe-Str. 2, 53127, Bonn, Deutschland, christian.brinkmann@ukb.uni-bonn.de.
Abstract
BACKGROUND: The latest approach to diagnosing glaucoma by high resolution spectral domain optical coherence tomography (SD-OCT) is to assess the minimal rim width (MRW) of the retinal nerve fiber layer (RNFL) at the Bruch's membrane opening (BMO) in the optic disk margin. OBJECTIVE: This study was carried out to evaluate if this new parameter allows a more precise detection of glaucomatous damage to the RNFL. METHODS: This article presents clinical examples and differences in the measurement methods in glaucoma cases. RESULTS: The main advantage is the automated detection by software allowing precise landmark tracking and coherent follow-up investigations. There seem to be considerable differences between the funduscopically assumed margin and the detection of the margin by the new software. Likewise there is a difference between RNFL measurements taken at the BMO and the peripapillary scan by SD-OCT. DISCUSSION: Ongoing research should assess the potential of this new parameter for a more precise detection of nerve fiber defects and changes over time compared to other imaging techniques.
BACKGROUND: The latest approach to diagnosing glaucoma by high resolution spectral domain optical coherence tomography (SD-OCT) is to assess the minimal rim width (MRW) of the retinal nerve fiber layer (RNFL) at the Bruch's membrane opening (BMO) in the optic disk margin. OBJECTIVE: This study was carried out to evaluate if this new parameter allows a more precise detection of glaucomatous damage to the RNFL. METHODS: This article presents clinical examples and differences in the measurement methods in glaucoma cases. RESULTS: The main advantage is the automated detection by software allowing precise landmark tracking and coherent follow-up investigations. There seem to be considerable differences between the funduscopically assumed margin and the detection of the margin by the new software. Likewise there is a difference between RNFL measurements taken at the BMO and the peripapillary scan by SD-OCT. DISCUSSION: Ongoing research should assess the potential of this new parameter for a more precise detection of nerve fiber defects and changes over time compared to other imaging techniques.
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