COVID‐19 retinal microangiopathy as an in vivo biomarker of systemic vascular disease?

COVID‐19 is caused by SARS‐CoV‐2, a betacoronavirus that uses the angiotensin‐converting enzyme‐related carboxypeptidase (ACE2) receptor to gain entry into cells. ACE2 receptor is widely expressed in multiple organs, including the retina, an extension of the central nervous system. The ACE2 receptor is involved in the diabetic and hypertensive retinopathy. Additionally, coronaviruses cause ocular infections in animals, including retinitis, and optic neuritis.

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