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Alfred Sommer
Researcher at Johns Hopkins University
Publications - 366
Citations - 32936
Alfred Sommer is an academic researcher from Johns Hopkins University. The author has contributed to research in topics: Xerophthalmia & Vitamin A deficiency. The author has an hindex of 86, co-authored 364 publications receiving 31556 citations. Previous affiliations of Alfred Sommer include Centers for Disease Control and Prevention & Johns Hopkins University School of Medicine.
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Journal ArticleDOI
Asymmetry and variation in the normal hill of vision.
Joanne Katz,Alfred Sommer +1 more
TL;DR: This analysis describes the symmetry and variation in the shape and height of the "hill of vision" obtained from automated static visual field testing of normal eyes of 81 people aged 20 to 78 years, with the greatest decrease occurring in the superior quadrant.
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History of nightblindness: a simple tool for xerophthalmia screening.
TL;DR: Results suggest a properly eleicited history of nightblindness can be almost as specific and far more sensitive an index of vitamin A deficiency and early xerophthalmia than the prescence of Bitot's spots (X1B), and that Vitamin A deficiency is a clustered, neighborhood phenomenon rather than an isolated, sporadic occurrence.
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Prevalence and significance of optic disc hemorrhage in a longitudinal study of glaucoma.
TL;DR: While the number of eyes with disc hemorrhages in this study is small, in a patient with glaucoma or ocular hypertension, disc hemorrhage appears to be associated with a greater likelihood of ongoing damage, which limits its usefulness as a screening tool for glAUcoma.
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Night blindness is prevalent during pregnancy and lactation in rural Nepal.
Joanne Katz,Subarna K. Khatry,Keith P. West,Jean H. Humphrey,Steven C. LeClerq,Elizabeth K. Pradhan,R. P. Pohkrel,Alfred Sommer +7 more
TL;DR: Vitamin A deficiency, for which night blindness is a marker, seems to be a problem in this population of pregnant and lactating women, with potential health consequences for women and their infants.
Journal Article
Blindness and visual impairment in southern Malawi.
Moses C. Chirambo,James M. Tielsch,Keith P. West,Jonathan L. Katz,Teferra Tizazu,Larry Schwab,Gordon J. Johnson,J. Swartwood,Hugh R. Taylor,Alfred Sommer +9 more
TL;DR: A population-based prevalence survey of ocular disease in the Lower Shire River Valley in southern Malawi found the prevalence of bilateral blindness found (1.27%) is similar to that in other developing countries and represents a significant public health problem.