title: Authors' response.
authors.affiliation: Athens, Georgia.
authors.forename: Laura M
authors.initials: LM
authors.lastname: Fletcher
authors.forename: Michael
authors.initials: M
authors.lastname: Engles
authors.forename: Billy R
authors.initials: BR
authors.lastname: Hammond
mesh_terms: D015350:Contrast Sensitivity / Q000502:physiology*; D004787:Environmental Pollution / Q000009:adverse effects*; D005260:Female; D006801:Humans; D065348:Macular Pigment / Q000502:physiology*; D008297:Male; D014786:Vision Disorders / Q000503:physiopathology*
chemical_list: D065348:Macular Pigment