A recent study aimed to set the record straight on the occurrence of retinal vein occlusions (RVOs) following messenger RNA COVID-19 vaccinations.
A large cohort study found that there is no association between the first messenger RNA (mRNA) COVID-19 vaccinations and acute retinal vein occlusion (RVO),1 according to first author Ian Dorney, BS, from Case Western Reserve University School of Medicine, Cleveland, Ohio, US.
A few of the recent case reports2-5 on the topic have suggested an association between the development of new-onset RVO and mRNA COVID-19 vaccinations. Because of the negative impact of RVOs on vision, the authors of the study under discussion considered that an epidemiologic investigation was important to determine the impact of the vaccinations on the public health.
The investigators sought to determine how often patients are diagnosed with new RVO acutely after the first mRNA COVID-19 vaccine compared with other very commonly administered vaccines, ie, influenza and tetanus, diphtheria, pertussis (Tdap) vaccines.
The data from the electronic health records of more than 103 million patients were included in this retrospective population-based cohort study. The data were searched for vaccination Common Procedural Technology codes and newly diagnosed RVO within 21 days of vaccination, and the relative risks were determined. The primary outcomes was the development of RVO with 21 days of vaccination.
The analysis showed that 0.003% of patients had a new diagnosis of RVO within 21 days after receiving a mRNA COVID-19 vaccination, and the vaccination was not associated with development of RVO.