Covid-19: the little-known syndrome of occlusions in the eye caused by obstruction of blood vessels

American researchers have established a link between potential coronavirus contamination and occlusions observed in the eye, some infected patients having even reported partial or total loss of vision.

When the epidemic broke out, the impact of Covid-19 on our respiratory tracts was quickly documented, before it was discovered over the months that many parts of our body could also be affected by repercussions. of the virus. More recently, researchers at the University of Michigan (United States) looked at the potential inconvenience that the virus could cause on our eyes.

In a study published on April 14 on the JAMA Network website, they make the link between a potential infection and an occlusion of the central retinal artery (OACR). Specifically, these OACRs can cause blurred vision or even sudden loss of vision in one eye. They also mention the case of retinal vein occlusions which increase by 47% between two and 26 weeks after contamination, according to the researchers.

A reassuring evolution for most patients

For these various occlusions, the observed phenomenon is as follows: blood vessels located in the retina are blocked by clots or fatty deposits. For this reason, some speak of an “eye stroke”, although the consequences are very different from a stroke itself. Vision is logically affected since it is through the retina that the eye receives light, the vector of images to the brain.

The scientists add that therapeutic management is possible, in the sense that the Covid would affect the veins more than the arteries. Otherwise, it would have been more difficult. They are also reassuring in reporting a gradual return to normal in many patients affected by these conditions. Unfortunately, patients who suffer from total vision loss have no treatment available to them.

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