Optic Perineuritis in an Asymptomatic SARS-CoV-2 Infection.

Introduction: Optic perineuritis (OPN) is a previously undescribed sequela of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Here we present a case of OPN that developed several weeks after initial confirmation of the presence of novel coronavirus RNA in the nasopharynx by polymerase chain reaction assay and subsequent confirmation of SARS-CoV-2 IgG seropositivity in the absence of other systemic inflammatory or infectious markers.

Case Report: An asymptomatic 71-year-old man with noninsulin-dependent diabetes mellitus (NIDDM) tested RNA positive for SARS-CoV-2 during a routine screening of patients at a skilled nursing facility.

Vergence neurons identified in the rostral superior colliculus code smooth eye movements in 3D space.

The rostral superior colliculus (rSC) encodes position errors for multiple types of eye movements, including microsaccades, small saccades, smooth pursuit, and fixation. Here we address whether the rSC contributes to the development of neural signals that are suitable for controlling vergence eye movements. We use both single-unit recording and microstimulation techniques in monkey to answer this question.

Neuronal evidence for individual eye control in the primate cMRF.

Previous single unit recordings and electrical stimulation have suggested that separate regions of the MRF participate in the control of vergence and conjugate eye movements. Neurons in the supraoculomotor area (SOA) have been found to encode symmetric vergence [Zhang, Y. et al.