Director: Dr. Randy Hammond The primary goal of our research program is to conduct basic and applied studies on the visual system. A primary focus of the laboratory has been the study of the dietary carotenoids lutein and zeaxanthin, concentrated within the fovea (termed macular pigment or the macula lutea) and brain. These studies have ranged across populations, infants to elderly, normal to diseased, and techniques, from pyschophysics to neuroimaging. Researchers involved in the UGA Vision Laboratory: B. Randy Hammond, Jr, Ph.D.- Principal Investigator Lisa Renzi-Hammond, Ph.D.- Co-investigator Colin Gardner- Graduate Student Jeffrey Nightingale- Graduate Student Selected Publications: Hammond, B.R. and Renzi-Hammond, L. (2016). A critical look at the ancillary Age-Related Eye Disease Study 2: Nutrition and cognitive function results in older individuals with age-related macular degeneration. Advances in Nutrition, 7, 433-37. Hammond, B.R., Miller, L.S., Bello, M.O., Lindbergh, C.A., Mewborn, C.M., Renzi-Hammond. L.M. (2017). Effects of a lutein/zeaxanthin intervention on cognitive function: a randomized, double-masked, placebo-controlled trial of community dwelling older adults. Frontiers in Aging Neuroscience, 9, 1-9. Hammond, B. R., & Renzi-Hammond, L. (2018). Individual variation in the transmission of UVB radiation in the young adult eye. PloS one, 13(7), e0199940. Stringham, J.M., Johnson, E.J. and Hammond, B.R. (2019). Lutein across the lifespan: From childhood cognitive performance to the aging eye and brain. Current Developments in Nutrition, 1-8. Hammond, B.R. et al. (2019). The effects of blue-light intraocular lenses on the protection and function of the visual system. Clinical Ophthalmology, 13, 2427-43. Hammond, B. R., Buch, J., Hacker, L., Cannon, J., Toubouti, Y., & Renzi-Hammond, L. M. (2020). The effects of light scatter when using a photochromic vs. non-photochromic contact lens. Journal of Optometry, 13, 227-34. Hammond, B. R., Buch, J., Sonoda, L., & Renzi-Hammond, L. (2021). The Effects of a Senofilcon A Contact Lens With and Without a Photochromic Additive on Positive Dysphotopsia Across Age. Eye & Contact Lens, 47(5), 265. Hammond, B. R., & Buch, J. (2020). Individual differences in visual function. Experimental Eye Research, 108186. Buch, J., & Hammond, B.R. (2020). Photobiomodulation of the Visual System and Human Health. International Journal of Molecular Sciences, 21(21),1-22. Nightingale, J. and Hammond, B.R. (2021). Measuring the behavioral effects of intraocular scatter. JOVE, 168 (e62290). 1-15.