The Gut-Eye Connection

How Your Microbiome Affects Vision and Eye Health

- by: Dr Khor Wei Boon

Most of us think of gut health in relation to digestion, but did you know that the bacteria in your gut could also affect your eyes? Scientists have discovered a fascinating connection between our gut “microbiome” - the trillions of bacteria, viruses and fungi living in our intestines - and various eye diseases. This gut-eye connection may play a crucial role in regulating inflammation and immune function, which means that an imbalance in the gut microbiome (termed “dysbiosis”) could contribute to eye conditions like age-related macular degeneration (AMD), diabetic retinopathy and dry eye disease. As researchers continue to explore this connection, it is becoming increasingly clear that taking care of your gut might be just as important for your eyes and overall well-being, as it is for digestion.

HOW THE GUT MICROBIOME IMPACTS THE BODY AND EYE HEALTH

A healthy gut contains a finely balanced mix of beneficial and harmful bacteria that helps to regulate the immune system, protect against infections, and produce essential vitamins and metabolites that affect the skin, joints and internal organs. However, when this balance is disrupted, the lining of our intestines may weaken or become “leaky”, allowing harmful substances to enter the bloodstream, and triggering our body's immune system.

In addition to inflammation, gut bacteria also influence oxidative stress and the production of key compounds, such as short-chain fatty acids (SCFAs), that help to maintain tissue health. Such changes have been linked to a multitude of conditions including obesity, diabetes, heart disease and autoimmune problems like rheumatoid arthritis.