Methods herein are described for improvement in visual function by administering macular carotenoid compositions containing an effective daily dose, to a subject in need thereof. More particularly, methods herein are described and include use of the compositions herein by identifying a subject in need thereof, administering a daily dose of lutein and/or zeaxanthin isomers, comprised of meso-zeaxanthin and R,R zeaxanthin, alone or in combination thereof, the composition also including at least one food grade excipient, and evaluating visual performance. The subject is exposed to light of variable wavelengths and intensity and is suffering from visual fatigue. The composition improves contrast sensitivity, glare performance, photo stress recovery, and/or macular pigment optical density, and thus alleviates visual fatigue. The composition is safe for human and other animals for consumption and can be used for improvement in visual health in the subject, when administered in an effective amount.
