key: cord-0989449-vjwoa3u3
authors: Hwang, Je Hyung
title: Uveitis after COVID-19 Vaccination
date: 2022-03-04
journal: Case Rep Ophthalmol
DOI: 10.1159/000521785
sha: 0d561f49d321820f5914b881150390da1d933f8e
doc_id: 989449
cord_uid: vjwoa3u3

This report describes a case of acute uveitis following COVID-19 vaccination. A 21-year-old patient was referred to our department for decreased visual acuity and injection of the left eye. Two days prior, the patient received her second dose of the severe acute respiratory syndrome coronavirus 2 vaccine (BNT162b2, Pfizer-BioNTech). On ocular examination, her left eye's best-corrected visual acuity was 20/250, and its intraocular pressure was 16 mm Hg on a noncontact tonometer. Hypopyon, 4+ cells, and flares were observed in the anterior chamber. The patient was diagnosed with acute uveitis. She received topical dexamethasone (0.1%) hourly and systemic prednisone (50 mg/day). After 7 days, her inflammatory symptoms were mostly resolved. COVID-19 vaccination can cause acute anterior uveitis, which is responsive to steroids.

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a highly infectious agent that causes COVID-19, which was first reported in Wuhan, China, on December 31, 2019 [1] . COVID-19 vaccines were rapidly developed based on previous vaccines for pathogens, such as the Middle East respiratory syndrome and severe acute respiratory syndrome [2] . In December 2020, the US Food and Drug Administration authorized the BNT162b1 (Pfizer Inc., New York, NY, USA; BioNTech, Inc., Mainz, Germany) and mRNA-1273 (Moderna, Inc., Cambridge, MA, USA) mRNA vaccines. Adenovirus vector vaccines (ChAdOX1 nCov-19 produced by Astra-Zeneca and Ad26.COV2.S produced by Janssen -Johnson & Johnson) have also been approved and distributed worldwide. The vaccines reduced the morbidity and mortality rates of the disease [3] . However, systemic side effects, such as thrombosis, have been reported [4] . Herein, we report a case of acute uveitis following COVID-19 vaccination.

A 21-year-old female patient was referred to our clinic for decreased visual acuity and injection of the left eye. The patient received her second dose of a SARS-CoV-2 vaccine (BNT162b2, Pfizer) 2 days before the symptom onset. Moreover, she had no history of uveitis.

On ocular examination, her best-corrected visual acuity was 20/20 in the right eye and 20/250 in the left eye. The intraocular pressure was 14/16 mm Hg on a noncontact tonometer. On slit-lamp examination, conjunctival injection and hypopyon with 4+ cells were observed in the left eye ( Fig. 1) . On fundus examination, the posterior pole was not observed because of dim vision and poor pupil dilation.

The patient was diagnosed with acute uveitis. She then received topical dexamethasone (0.1%) hourly, atropine sulfate eye drops (1%) twice a day, and systemic prednisone (50 mg). She underwent routine blood tests, C-reactive protein levels, antineutrophil, cytoplasmic antibody, streptolysin O, syphilis, tuberculosis, and HLA-B27. All test results were unremarkable. Three days after treatment, her best-corrected visual acuity improved to 20/200 in the left eye. On slit-lamp examination, the hypopyon was nearly resolved; however, 4+ cells were observed in the anterior chamber of the left eye. Dilated fundus examination revealed no vitritis or posterior uveitis in either eye. The patient continued receiving topical eye drops and systemic prednisone.

A slit-lamp examination was performed 7 days after treatment. Flares and 2+ cells were observed in the anterior chamber (Fig. 2) . The best-corrected visual acuity was 20/40 in the left eye, and the dilated fundus examination was normal. One month later, the cells and flares had subsided, and the best-corrected visual acuity was 20/20.

In this report, we present a case of acute uveitis in a young woman who received her second dose of the BNT162b2 vaccine. Vaccine-induced ocular complications rarely occur, and few studies on the ocular complications of the COVID-19 vaccine have been reported. A severe ocular complication is graft rejection postvaccination. There have been several reports of graft rejection following BNT162b2 vaccination [5, 6] . The occurrence of acute corneal epithelial rejection of living-related conjunctival limbal allograft has also been reported in a patient, who received the mRNA-1273 vaccine [7] . The World Health Organization recently released the interim recommendations on the use of the inactivated SARS-CoV-2 vaccine (BBIBP-CorV, Sinopharm, Beijing, China) [8] . El Sheikh et al. reported a case of uveitis following inactivated SARS-CoV-2 vaccination (BBIBP-CorV, Sinopharm, Beijing, China) [9] . Furthermore, Pan et al. reported a case of bilateral uveitis following administration of the same vaccine [10] . Recently, Rabinovitch et al. describe uveitis cases after the BNT162b2 mRNA SARS-CoV-2 vaccination [11] , and they reported that uveitis after vaccination is uncommon and manifests most often as a mild to moderate uveitis.

Vaccination possibly contributed to the occurrence of uveitis based on the temporal association between vaccination and the onset of uveitis. However, the exact pathogenesis of uveitis following vaccination remains unclear. Cunningham proposed a mechanism based on the molecular similarities between uveal self-peptides and vaccine peptides, delayed-type hypersensitivity, and immune responses against vaccine adjuvants [12] . Steinemann et al. suggested that increased vascular permeability after vaccination affected the immunologic capability of the cornea. Immune complex deposition in the uvea and iris initiates a local inflammatory response [13] . In our case, the patient's favorable response to prednisolone indicated the association between uveitis and the vaccine-induced immune response. In this patient, hypopyon and severe visual distortion were observed. These were not seen in previous uveitis cases, associated with BBIBP-CorV vaccination. However, the inflammation was adequately controlled and quickly responded to steroids. Based on previous reports on vaccine-induced uveitis, the inflammatory reaction, induced by inactivated vaccines, was more severe than that induced by mRNA vaccines. In conclusion, we reported a case of acute uveitis following a COVID-19 vaccination. Although initially severe, the patient's uveitis responded well to steroid therapy. In patients complaining of congestion or impaired vision postvaccination, the anterior chamber should be evaluated for inflammation to check for uveitis.

Written informed consent was obtained from the patient for publication of this case report and any accompanying images. This retrospective review of patient data did not require ethical approval in accordance with local guidelines. All procedures followed were in accordance with ethical standards and the Helsinki Declaration.

We have no conflict of interest to declare. 

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