Relationship between cataract removal and dementia
Exciting new evidence is shining a light on the potential benefits of cataract surgery for brain health! A recent study published in JAMA Internal Medicine suggests that removing cataracts could play a significant role in reducing the risk of developing dementia. This fascinating research examined over 3,000 older adults with cataracts or glaucoma, all of whom were dementia-free at the start of the study.
Here are some uplifting findings from the research:
Participants who underwent cataract surgery had a remarkable 29% lower risk of developing dementia compared to similar individuals who did not have the surgery.
Interestingly, for those with glaucoma, the risk of dementia remained the same whether they had surgery or not, as glaucoma surgery does not restore vision.
What’s particularly encouraging is that the study’s results were robust, showing that these findings weren't influenced by differences in health, access to healthcare, or other dementia risk factors.
So, why might cataract surgery help protect brain health? While the study didn’t explore the exact reasons, several intriguing theories have emerged:
Sensory Input Matters: The "use it or lose it" hypothesis suggests that reduced sensory input can hinder brain function. Some studies have shown that people experience improved brain function and even better MRI scans after cataract surgery, highlighting the importance of sensory stimulation.
Staying Active: Poor vision due to cataracts can lead to a decrease in mental and physical activity. Engaging in regular activities and social interactions is vital for maintaining cognitive health, and cataract surgery may encourage a more active lifestyle.
Combatting Depression: Vision loss from cataracts, alongside other age-related challenges, can contribute to feelings of depression, which is a known risk factor for dementia.
It’s possible that a combination of these factors is at play, and researchers are still working to uncover the exact reasons behind this positive link. The bottom line is, cataract surgery may not only improve vision but could also be a key player in promoting brain health as we age!
Source: Harvard Health Publishing. (2022, February 23). Could cataract surgery protect against dementia? Harvard Health Blog. Retrieved from https://www.health.harvard.edu/blog/could-cataract-surgery-protect-against-dementia-202202232693
