See the science on vision
Scientific research has demonstrated that a richer, denser macular pigment, or higher MPOD, can improve visual performance[10–12]. This benefit is associated with the ability of lutein and zeaxanthin to absorb blue light, the part of the visible light spectrum – remember the rainbow? – with the highest energy. Blue light is known to negatively impact the quality of our vision.
A rich macular pigment improves contrast sensitivity thus helping to define shapes that aren’t clearly outlined, such as objects in shadows, light colored objects against a bright sky. Good contrast sensitivity also improves vision in low-light conditions, allowing us to see finer and sharper details in dim light. If you’re playing baseball, golf, or tennis increased contrast sensitivity should be able to help you be on your game[11,12,14–17].