RNFLDicke

RNFLDicke is a term combining the abbreviation RNFL (retinal nerve fiber layer) with the German word "Dicke" (thickness) and commonly refers to the measured thickness of the retinal nerve fiber layer. It is used in clinical ophthalmology and optometry to describe how thick the RNFL is around the optic nerve head. The measurement is an important structural biomarker for optic nerve health.

Retinal nerve fiber layer thickness is most frequently measured by optical coherence tomography (OCT), which provides high-resolution, cross-sectional images and automated thickness maps. Reports often give global average thickness and sectoral values (quadrants or clock hours) and compare results to age-matched normative databases. Units are expressed in micrometers.

RNFL thickness is clinically relevant in the diagnosis and monitoring of glaucoma, where progressive thinning reflects loss of retinal ganglion cell axons. It also changes in other optic neuropathies, ischemic events, compressive lesions, and some neurodegenerative or inflammatory diseases. Longitudinal measurements are used to detect progression and to correlate structural changes with functional tests like visual fields.

Interpretation requires attention to scan quality, axial length, segmentation errors, and normal anatomical variation. Normative ranges vary by device and population, and values must be considered alongside clinical examination and other tests. The term RNFLDicke appears mainly in German-language reports and literature but corresponds directly to the RNFL thickness parameter used internationally.