Pine bark extract, specifically Pycnogenol® (a standardized extract from the bark of the French maritime pine, Pinus pinaster), has been investigated for its potential benefits in supporting eye health, particularly in relation to retinal microcirculation and diabetic retinopathy. Several clinical studies have reported that supplementation with pine bark extract may improve retinal blood flow and reduce the progression of early-stage diabetic retinopathy. The proposed mechanisms include its potent antioxidant properties, its ability to enhance endothelial function, and its role in reducing capillary permeability and inflammation.

For example, a randomized, placebo-controlled study published in Diabetes Research and Clinical Practice (2007) found that 150 mg/day of Pycnogenol® for three months improved retinal edema and visual acuity in patients with mild to moderate diabetic retinopathy. Other studies have observed similar benefits, including improved microcirculation in the retina and reduced symptoms of eye fatigue. However, while these results are promising, the overall body of evidence is limited by small sample sizes and the need for more robust, long-term clinical trials.

In summary, there is scientific evidence—though not yet conclusive—that pine bark extract may support eye health, especially in conditions involving microvascular dysfunction. Its use for general eye support is not rooted in traditional herbal medicine but is rather based on recent clinical research.