Patients with long COVID experienced a significant reduction in the density of blood vessels in the back of the eye, compared to healthy individuals.

The change in blood vessels in the deep part of the retina supports the hypothesis that long COVID affects similar blood vessels in other parts of the body, like the brain, which can potentially contribute to the symptoms of long COVID such as memory loss, brain fog and fatigue.

Comprehensive analysis of study thread on Twitter: New Study: Covid found to infect the eyes and replicate with in them: virus found in eyes months after infection:

'our data give us reason to believe that so-called long-Covid symptoms may include degenerative retinal disease.'

Study leader says.