CONTRAST DETECTION AND DISCRIMINATION IN YOUNG AND OLDER ADULTS

被引：14

作者：

BEARD, BL

YAGER, D

NEUFELD, S

机构：

[1] State College of Optometry, State University of New York, New York, NY

来源：

OPTOMETRY AND VISION SCIENCE | 1994年 / 71卷 / 12期

关键词：

SPATIAL VISION; AGING; CONTRAST SENSITIVITY; SUPRATHRESHOLD CONTRAST; VISUAL MASKING;

D O I：

10.1097/00006324-199412000-00009

中图分类号：

R77 [眼科学];

学科分类号：

100212 ;

摘要：

Purpose. To determine if age differences in contrast detection thresholds extend to suprathreshold contrast discrimination. Methods. Psychophysical contrast detection and discrimination thresholds were determined in 56 adults ranging in age from 22 to 72 years. In experiment 1, thresholds were measured using a two-interval forced-choice procedure across a range of pedestal grating contrasts. In experiment 2, detection and discrimination thresholds were measured at two spatial frequencies and two luminance levels. Results. When normalized to the contrast detection threshold, contrast discrimination thresholds were similar in young and older adults. This result is akin to previous findings for clinical patients with contrast detection deficits. In addition, contrast discrimination in the elderly is independent of mean display luminance as has been found in young adults. Conclusions. Normalized contrast discrimination functions have the same shape in young and older adults and show no change with a 4-fold reduction in luminance.

引用

页码：783 / 791

页数：9

共 38 条

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