RESUMEN
BACKGROUND: Since the outbreak of Coronavirus Disease 2019 (COVID-19) in December 2019, many studies have reported the presence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in the conjunctival sac of patients infected with this virus, with several patients displaying symptoms of viral conjunctivitis. However, to our best knowledge, there is no in-depth report on the course of patients with COVID-19 complicated by relapsing viral conjunctivitis or keratoconjunctivitis. CASE PRESENTATION: A 53-year-old man confirmed with COVID-19 developed symptoms of viral conjunctivitis in the left eye approximately 10 days after the onset of COVID-19. The results of a nucleic acid test were positive for SARS-CoV-2 in the conjunctival sac of the left eye. The symptoms were relieved 6 days after treatment. However, the patient was subsequently diagnosed with viral keratoconjunctivitis in both eyes 5 days after the symptoms in the left eye were satisfactorily relieved. The disease progressed rapidly, with spot staining observed at the periphery of the corneal epithelium. Although SARS-CoV-2 could not be detected in conjunctival secretions, the levels of inflammatory factors, such as interleukin-6, were increased in both eyes. Both eyes were treated with glucocorticoids, and symptoms were controlled within 5 days. There was no recurrence. CONCLUSIONS: In this case report, the pathogenesis, clinical manifestations, treatment, and outcome of a case with COVID-19 complicated by relapsing viral keratoconjunctivitis is described, and the involvement of topical cytokine surge in the pathogenesis of COVID-19 as it relates to viral keratoconjunctivitis is reported.