Grab some walnuts and a plate of fish, new research shows Omega–3 fatty acids found in these foods may keep you seeing straight. That means omega 3’s could help prevent eye diseases like retinopathy, which are caused by an overgrowth of leaky blood vessels in the eyes. The fatty acids also activated proteins that improve insulin sensitivity. Those proteins are the same ones targeted by type 2 diabetes drugs. This means omega 3's could also be used to improve insulin sensitivity in people with diabetes or pre–diabetes.