This case report describes a negative result for antigen testing for the SARS-CoV-2 virus in an aqueous sample taken during the management of suspected herpes simplex keratitis from a patient with confirmed SARS-CoV-2 based on antigen testing of high nasal swab. The implications of no viral load detectable in the aqueous sample are discussed in context of routine phacoemulsification surgery during the SARS-CoV-2 pandemic.
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