title: Evolution, age and ocular focus.
abstract: A number of hypotheses has been advanced during the last 130 years to explain the progressive loss of accommodation of the human crystalline lens. None has dealt with the high initial value of accommodation which enables infants to form sharp retinal images of objects as close as 6 or 7 cm. This paper attempts to relate the initial value to the overall loss in terms of evolution and biological cost.
authors.affiliation: Age Concern Institute of Gerontology, King's College London, U.K.
authors.forename: R A
authors.initials: RA
authors.lastname: Weale
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology*; D000293:Adolescent; D000328:Adult; D000375:Aging / Q000502:physiology*; D000818:Animals; D005075:Biological Evolution; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008253:Macaca mulatta; D008875:Middle Aged; D013045:Species Specificity