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</html><thumbnail_url>https://retinaclub.es/wp-content/uploads/2024/09/5.12-Fibras-Color-copia-768x768.webp</thumbnail_url><thumbnail_width>600</thumbnail_width><thumbnail_height>600</thumbnail_height><description>Persistence of myelinated nerve fibers is a congenital abnormality that is usually asymptomatic, unilateral or bilateral, and appears as whitish streaks, usually close to the optic disc. Diagnosis by fundus examination is usually simple. Optical coherence tomography shows thickening of the nerve fiber layer (RNFL) with increased signal and shadowing of the outer retinal layers, [&hellip;]</description></oembed>
