A new study has found a possible link between a popular blood pressure medicine and a higher risk of getting glaucoma, an eye disease that can lead to permanent vision loss.
The study looked at a group of medications called Calcium Channel Blockers, or CCBs for short.
The research was led by Dr. Alan Kastner and his team from Moorfields Eye Hospital and University College London. They studied the health records of 427,480 adults in the U.K. Out of all those people, 33,175 were taking CCBs to manage their blood pressure.
After studying the data carefully and considering other factors like age, health conditions, and lifestyle habits, the scientists found something concerning. People who were taking CCBs were more likely to have glaucoma. This risk was not seen with other types of blood pressure medicines.
Even more surprising was that some people on CCBs showed early signs of glaucoma, like changes in their eyes, even though the pressure inside their eyes was normal.
Usually, glaucoma is linked to high eye pressure, which damages the optic nerve. But this study suggests that CCBs may be harming the eyes in a different way that we don’t fully understand yet.
Dr. Kastner and his team say we need more research to find out if CCBs are truly causing glaucoma or if there is another reason for the link. They also want to learn how these medicines might be affecting eye health.
This is important because millions of people around the world take CCBs every day. These drugs help lower blood pressure by relaxing blood vessels and making it easier for blood to flow. This protects people from heart disease and stroke. But if these same medicines are also raising the risk of glaucoma, doctors and patients need to be more careful.
Glaucoma is a serious condition that often shows no symptoms in the early stages. People may not realize they have it until their vision is already damaged. And once the damage is done, it cannot be reversed. That’s why regular eye check-ups are so important, especially for people who are at higher risk.
This study is a reminder that even helpful medicines can have unexpected side effects. If you’re taking CCBs, it doesn’t mean you should stop using them. But it’s a good idea to talk to your doctor, especially if you or someone in your family has had glaucoma.
The researchers have asked for more studies to better understand what’s happening. They also want to find out how to lower this possible risk while still treating high blood pressure safely.
It’s also worth noting that some of the researchers have connections to drug companies. While this doesn’t mean the study results are wrong, it’s something to keep in mind.
If you care about your eyes, stay informed and make sure to see your eye doctor regularly. There are also many new studies about protecting your eyes from diabetes, managing dry eyes, and even how some eye surgeries may help reduce dementia risk.
This study was published in JAMA Ophthalmology.
Copyright © 2025 Knowridge Science Report. All rights reserved.
