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By Peter A. McCullough, MD, MPHOver the course of the pandemic, many of my patients have commented they believe COVID-19 infection has worsened their vision.🧬 Paper Summary: Moustardas et al. — Post-COVID Ocular SyndromeCore findingThisNature Communicationsstudy (2026, doi:10.1038/s41467-026-74858-4) formally characterizes a distinct post-COVIDpersistent ocular syndrome (POS)in people who hadmildCOVID-19 that never required hospitalization.The authors documented:Ocular symptoms persisting 3 months to 3 yearspost-infectionStrabismus(latent eye misalignment/esophoria) with depleted fusional reservesPupillary dysautonomia— weakened autonomic pupil reflexesCorneal peripheral neuropathy— reduced subbasal nerve density (−2.85 mm/mm², P = 0.0001) and weakened blink reflexChronic T cell / dendritic cell activationin the corneal nerve plexus (mature DC/T density +8.05 cells/mm², P < 0.0001)178 dysregulated tear proteins, including ITGB6, NFASC, CTGF, TPSAB1, and CKMT1A/B — a signature overlapping withsevereCOVID-19 blood/tissue proteomesMost telling:33% of affected patients were on part-time or full-time sick leave, yet only 39% of those had a formal long-COVID diagnosis. This is an underdiagnosed, high-disability population.Subscribe nowRead more