Seeing the Bigger Picture: How Eye Health Is Key to Brain Health

Key takeaways

• Your eyes and brain are closely connected, and the pigments that support healthy vision also show up in areas of the brain tied to memory and focus.

• Macular Pigment Optical Density (MPOD) reflects levels of lutein and zeaxanthin in the eye, and research has explored associations between higher MPOD and aspects of cognitive performance. 

• Diet is the foundation: leafy greens, colorful vegetables, egg yolks, and fatty fish are among the best sources of eye- and brain-supporting nutrients.

• Supplements with lutein, zeaxanthin, omega-3s, polyphenols, vitamin D, and L-theanine may complement a nutrient-rich diet when getting enough from food is difficult.

• Results vary from person to person, and these nutrients support general wellness rather than replacing professional care. Check with a qualified healthcare professional before starting anything new.

When we think about supporting our brainpower or learning abilities, eye health isn’t usually the first thing that comes to mind. But our eyes do more than just help us see. They’re closely tied to how our brains function.

Imagine someone navigating a busy city street. Their eyes are constantly taking in details like moving cars, traffic lights, and pedestrians, instantly relaying this information to the brain to make split-second decisions and keep them safe. This connection between sight and processing highlights how integral eye health is to cognitive function and decision-making, creating a direct link between what we see and how we respond.

A key factor in this eye-brain connection is something called Macular Pigment Ocular Density (MPOD). While MPOD plays a crucial role in protecting our vision, research has also explored its relationship with cognitive performance and overall brain health. 

So by taking care of our eyes, we may be supporting our brains, too.

What exactly is MPOD and how does it influence the brain?

MPOD measures the concentration of pigments in the macula—the central part of the retina at the back of the eye.

The macular pigment, which serves as a protective layer for the eyes, is primarily composed of the carotenoids lutein and zeaxanthin, which are antioxidants found in dark leafy greens like spinach and kale, as well as in colorful foods like corn, yellow peppers, and egg yolks.

The macular pigment provides two essential benefits:

• Blue light filtering: Lutein and zeaxanthin help filter blue light before it reaches sensitive cells in the retina. This may help support long-term eye health. 

• Antioxidant defense: As powerful antioxidants, these carotenoids neutralize free radicals that can harm retinal cells.

Interestingly, lutein and zeaxanthin are also present in areas of the brain involved in cognitive processing. Research has explored associations between higher concentrations of these pigments in the macula (indicated by higher MPOD levels) and performance on measures of memory, processing speed, perceptual speed, and executive function, even in children.

But it doesn’t stop there. Research has also explored associations between higher MPOD levels and performance on certain learning- and attention-related tasks, including phonemic fluency, attention switching, and visual and verbal memory. 

These findings suggest an interesting connection between eye health and cognitive function, though research is still evolving. 

How to support MPOD levels

So, how can you build up your MPOD levels to reap those cognitive benefits?

Luckily, it’s easier than you might think.

Watch what you eat

One of the most effective ways is through nutrition. Choosing foods rich in lutein and zeaxanthin, the two main pigments in the macula, can help raise MPOD levels.

Here are some examples:

• Leafy greens like spinach, kale, and collard greens

• Broccoli, peas, zucchini, and corn

• Egg yolks, which contain both lutein and zeaxanthin in a highly absorbable form

• Colorful veggies like yellow peppers and pumpkin

• Fruits like kiwi, grapes, and oranges

Add fatty fish to your diet

Fatty fish such as sardines, salmon, and mackerel are packed with omega-3 fatty acids, which support retinal health and brain function. Omega-3s help maintain the structural integrity of retinal cells, supporting healthy aging and everyday cognitive function.

Including fatty fish in your diet provides a natural, balanced way to get these essential fatty acids. Aim for two servings per week to gain the eye and brain health benefits of omega-3s.

Consider supplements

If vegetables and fish aren’t your favorites, or if a busy lifestyle makes it challenging to get enough nutrients through diet alone, there are still plenty of options to support your eye and brain health.

Supplements containing essential nutrients like lutein, zeaxanthin, vitamin E, and omega-3s can offer similar benefits, making them an accessible way to support macular and cognitive health even when time or food preferences get in the way.

The best supplements for eye and brain health

To support both eye and brain wellness, certain supplements, often referred to as "brain supplements" or "supplements for memory," have shown promising benefits. Here’s a breakdown of some of the best options:

Lutein and zeaxanthin

Lutein and zeaxanthin work together to strengthen the MPOD shield, essentially reinforcing the protective layer in your eyes and making it more resistant to harmful light. They help support healthy macular pigment levels, and researchers continue to study how these nutrients may relate to cognitive function. 

Of course, it’s always best to check with your doctor before starting any new dietary supplement regimen.

Check alternative approaches to eye health

In addition to modern supplements, traditional Chinese medicine (TCM) offers alternative approaches to eye—and by extension, brain—health. Here are a few popular TCM remedies:

• Goji berries (wolfberries): Rich in antioxidants including zeaxanthin and lutein, goji berries contain compounds that may support eye health and healthy vision as we age. Their high antioxidant content helps combat oxidative stress in the body, which research suggests may benefit cognitive function and overall brain health.

• Chrysanthemum flower tea: Known for its cooling properties, this caffeine-free tea contains antioxidants like flavonoids and beta-carotene. It has been used for centuries to help ease eye fatigue and support eye health, whether from reading, detailed craftwork, or, in modern times, digital screen use.

• Schisandra berries: These adaptogenic berries contain compounds that may support circulation and liver function. Traditional uses include helping ease eye fatigue and support mental focus, particularly during periods of stress.

• Rehmannia root: This herb is available in two main forms: raw and prepared. The raw form is traditionally used to cool the blood and clear heat, while the prepared form (steamed or cooked) is used to nourish the blood, support healthy circulation, and maintain eye health, particularly in combination with other herbs.

As with any supplement, it’s always best to consult a healthcare professional before beginning a new regimen, particularly when combining traditional remedies with modern supplements.

Supporting eye and brain health: A holistic approach

Caring for your eyes goes beyond clearer vision. It supports your cognitive well-being, too. By nourishing your body with essential nutrients like lutein, zeaxanthin, omega-3s, and traditional remedies such as goji berries and chrysanthemum tea, you’re taking a holistic approach to eye and brain health.

Whether through modern supplements or time-honored practices, the choices you make today can help you maintain mental sharpness, visual clarity, and a sense of calm focus for years to come. Remember, before starting any new supplement regimen, consult with a healthcare professional to find the best approach for you.