Abstract
Growing data are confirming the association between the novel coronavirus disease (COVID-19) and eye disorders, including ocular alterations and neuro-ophthalmic manifestations. The main pathophysiological mechanisms considered included a direct infection through the ocular surface, a post-viremia secretion of the virus from the lacrimal glands, and a viral dissemination through the bloodstream. According to the different ways of contagion, different structures could be involved.
The most common ocular symptoms reported in COVID-19 patients were dry eye, redness, tearing, itching and pain. Among symptomatic patients, most of them presented conjunctivitis. Considering the posterior chamber, retinal artery and vein occlusions were described in few clinical reports; moreover, some studies presented cases of paracentral acute middle maculopathy occurring in COVID-19 patients. The involvement of the choroid seems to be rare, and a single case of atypical choroiditis was currently described. Between neuro-ophthalmic manifestations, optic neuritis appear to be relatively frequent and generally not associated with magnetic resonance imaging abnormalities. Some reports showed the involvement of the ocular motor nerves, often presenting with palsy. Miller Fisher syndrome has been showed in rare cases; however, this association could be corroborated by the several reports describing Guillain–Barré syndrome occurrence in COVID-19 patients.
In line with well-known previous viral infection, COVID-19 seems to be associated with eye involvement. Thus, ocular and neuro-ophthalmic symptoms and signs should be carefully assessed and monitored in these patients. To reach this purpose, it is critical to implement remote diagnostic techniques. Moreover, the comprehension of the pathogenetic mechanisms is still scarce and no standardized diagnostic protocol was established for these patients, making necessary further studies to improve current understandings.
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Acknowledgments
All the authors are thankful to their teammates and collaborators. They also thank all health workers around the world who are dealing with this pandemic; all the authors express their deepest condolences and offer a heartfelt thanks to all colleagues fallen fighting against this invisible enemy, as well as to their families.
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E.P., R.A., G.K.W., I.A.I., and F.L. declare no conflict of interest, and do not receive any financial aid. B.D.M. is supported to conduct COVID-19 neuroscience research by the UKRI/MRC (MR/V03605X/1); for additional neurological inflammation research due to viral infection B.D.M. is also supported by grants from the MRC/UKRI (MR/V007181//1), MRC (MR/T028750/1), and Wellcome (ISSF201902/3).
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Conceptualization: E.P., R.A., B.D.M. and F.L.; literature research, screening, and selection: E.P., R.A., G.K.W. and I.A.I.; original draft preparation: E.P. and F.L.; review: G.K.W. and I.A.I.; writing and editing: all authors.
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Premi, E., Acampora, R., Wood, G.K., Ilie, I.A., Michael, B.D., Lanfranchi, F. (2022). Eye Disorders and Neuro-ophthalmic Manifestations of COVID-19. In: Adibi, S., Griffin, P., Sanicas, M., Rashidi, M., Lanfranchi, F. (eds) Frontiers of COVID-19. Springer, Cham. https://doi.org/10.1007/978-3-031-08045-6_12
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Publisher Name: Springer, Cham
Print ISBN: 978-3-031-08044-9
Online ISBN: 978-3-031-08045-6
eBook Packages: MedicineMedicine (R0)