Results revealed that taking both doses of the vaccine led to thicker corneas, fewer endothelial cells in the eye and more variation in size of these specialized cells that form the endothelium.

In the short term, these changes suggest the Pfizer vaccine may temporarily weaken the endothelium, even though patients didn’t suffer clear vision problems during the study.

For people with healthy eyes, these small changes likely won’t affect vision right away.

However, if scientists find that these changes last for years, they could lead to corneal swelling or blurry vision, especially in those with pre-existing eye problems or people who have had a cornea transplant.

Read more: Scientists discover Pfizer COVID jab linked to major eye damage

Scientists discover Pfizer COVID jab linked to major eye damage