Scientists have discovered that Pfizer’s COVID-19 vaccine may increase the risk of eye damage, leading to vision loss.
The new study specifically examined how the vaccine affected patients’ corneas, the clear front part of the eye that allows light to enter.
In 64 people, scientists in Turkey measured changes in the cornea’s inner layer, called the endothelium, before taking the first Pfizer dose and two months after receiving the second.
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.
Scientists discover Pfizer COVID jab linked to eye changes that raise corneal damage risk https://t.co/ndqcs5NjeR
— Daily Mail US (@Daily_MailUS) July 18, 2025
BREAKING: COVID-19 mRNA Shots Destroy 8.4% of Non-Renewable Eye Cells in Just 75 Days
— Peter A. McCullough, MD, MPHยฎ (@P_McCulloughMD) July 15, 2025
New study finds irreversible structural damage to the eye's corneal endothelium in healthy young adults following Pfizer mRNA injection. No wonder many vaccinated have vision problems afterโฆ pic.twitter.com/HolUqxfHEb
