The Vision Sciences Laboratory studies all aspects of the human visual system. This extends from basic studies of the cornea, lens and retina to applied studies of visual processing within the brain. A primary focus of the laboratory has been the investigation of how lifestyle, primarily dietary, influences both the development of degenerative disease and the normal function of the central nervous system. For example, we use psychophysical methods to measure the concentration of the dietary carotenoids lutein and zeaxanthin within the fovea (termed macular pigment or the macula lutea) and have related those pigments to various aspects of retinal and brain function.
The combination of expertise and our interdisciplinary approach has led to insights in a diversity of areas. For example, we have published data relative to the development of age-related eye disease and we are currently studying preventive approaches to dementia (including Alzheimers and Cognitive decline). We are also working on issues in Sports Vision and other aspects of visual performance. Another strong area in our laboratory is the maturation of the infant visual system and brain.
Hammond, B.R., Fletcher, L. and Elliott, J. (2013) Glare disability, photostress recovery, and chromatic contrast: relation to serum and retinal lutein and zeaxanthin.Investigative Ophthalmology and Visual Science. 54(1), 476-81.
Renzi, L.M., Dengler, M.J., Puente, A., Miller, L.S. and Hammond, B.R. (2014). Relations between macular pigment optical density and cognitive function in unimpaired and mildly cognitively impaired older adults. Neurobiology of Aging, 35(7), 1695-1699.
Bovier, E.R., Renzi, L. and Hammond, B.R. (2014). A double-blind, placebo-controlled study on the effects of lutein and zeaxanthin on neural processing speed and efficiency. PLoS ONE 9(9): e108178. doi:10.1371/journal.pone.0108178.
Hammond, B.R., Johnson, B.A., George, ER. (2014). Oxidative photodegradation of ocular tissues: beneficial effects of filtering and exogenous antioxidants. Experimental Eye Research, 129, 135-50.
Hammond, B.R., Fletcher, L., Roos, F., Wittwer, J. and Schalch, W. (2014) A double- blind, placebo-controlled study on the effects of lutein and zeaxanthin on photostress recovery, glare disability and chromatic contrast. Investigative Ophthalmology and Visual Science, 55, 8583-89.
Bovier, ER and Hammond, B.R. (2015). A randomized placebo-controlled study on the effects of lutein and zeaxanthin on visual processing speed in young healthy subjects. Archives of Biochemistry and Biophysics. 572, 54-57.
Hammond, B.R. (2015). Attenuating glare disability and photostress in pseudophakes through the addition of a short-wave absorbing filter. Journal of Ophthalmology, 215, 1-8.
Renzi, L. and Hammond, B.R. (2016). The effects of photochromic lenses on visual performance. Clinical and Experimental Optometry, 1-7.
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, 9, 1-9.
Selected Professional Activites
Association for Research in Vision and Ophthalmology Adjunct Faculty
Foods and Nutrition Department, University of Georgia Faculty
Gerontology Program, University of Georgia