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Differential effects of aging on spatial contrast sensitivity to linear and polar sine-wave gratings BJMBR
Costa,T.L.; Nogueira,R.M.T.B.L.; Pereira,A.G.F.; Santos,N.A..
Changes in visual function beyond high-contrast acuity are known to take place during normal aging. We determined whether sensitivity to linear sine-wave gratings and to an elementary stimulus preferentially processed in extrastriate areas could be distinctively affected by aging. We measured spatial contrast sensitivity twice for concentric polar (Bessel) and vertical linear gratings of 0.6, 2.5, 5, and 20 cycles per degree (cpd) in two age groups (20-30 and 60-70 years). All participants were free of identifiable ocular disease and had normal or corrected-to-normal visual acuity. Participants were more sensitive to Cartesian than to polar gratings in all frequencies tested, and the younger adult group was more sensitive to all stimuli tested. Significant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Contrast sensitivity; Circular gratings; Linear gratings; Aging; Spatial vision.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013001000855
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