Analysis of Optic Disc Swelling Secondary to Various Etiologies Using Optical Coherence Tomography Angiography

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  • Nakano Eri
    Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine

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  • 乳頭腫脹におけるOCTアンギオグラフィー

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<p>　Evaluation of the optic disc using optical coherence tomography angiography（OCTA）helps in identifying tortuous and dilated superficial optic disc vessels. The optic disc resembles a tangled ball of vessels in such cases. Peripapillary capillary density（PCD）in patients with papilledema is similar to that in patients with healthy eyes. However, severe papilledema is associated with reduced vessel density. PCD in patients with pseudopapilledema is lower than that in patients with papilledema. Papilledema is often indistinguishable from pseudopapilledema or other causes of disc swelling. Previous studies have reported that papilledema can be distinguished from non-arteritic anterior ischemic optic neuropathy（NAION）based on the fact that PCD or vessel density in the optic nerve head is decreased in patients with NAION. Technological advances in imaging techniques and image segmentation have contributed to improved OCTA quality, and OCTA can accurately detect the blood flow to the optic nerve head or the peripapillary area. Therefore, OCTA can serve as a useful diagnostic aid to gain a better understanding of the pathophysiology of disc swelling associated with various etiologies.</p>

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