Lenticular Senescence and the Retina
Ever since the time of Helmholtz, research workers have concerned themselves with why and how presbyopia occurs (Bito, 1988; Brückner, 1959). However, the matter has only rarely been approached from an evolutionary point of view (cf. Bito and Miranda, 1987). The outstanding question in this context is not so much why accommodation is lost in midlife as why it is well over 10 D in the very young. In what circumstances does anyone have to form detailed retinal images of objects a mere 8 or 10 cm from the eyes?
KeywordsVisual Acuity Spatial Frequency Retinal Pigment Epithelium Contrast Sensitivity Human Retinal Pigment Epithelium
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- Bito, L. Z., and Miranda, O. C., 1987, Presbyopia, the need for a closer look, in: Presbyopia (L. Stark and G. Obrecht, eds.), Fairchild Publications, New York, pp. 411–429.Google Scholar
- Harman, D., 1985, Role of free radicals in aging and disease, in: Relations between Normal Aging and Disease (A. H. Johnson, ed.), Raven Press, New York, pp. 45–84.Google Scholar
- Warner, H. R., Butler, R. N., Sprott, R. L., and Schneider, E. L. (eds.), 1987, Modern Biological Theories of Aging, Raven Press, New York.Google Scholar
- Weale, R. A., 1982, A Biography of the Eye—Development, Growth, Age, H. K. Lewis, London.Google Scholar
- Weale, R. A., 1988a, Age and the transmittance of the human crystalline lens, J. Physiol. (Lond.) 395:577–587.Google Scholar