A comparison of binocular summation in young and older patients
作者:
PardhanShahina,
期刊:
Current Eye Research
(Taylor Available online 1996)
卷期:
Volume 15,
issue 3
页码: 315-319
ISSN:0271-3683
年代: 1996
DOI:10.3109/02713689609007626
出版商: Taylor&Francis
关键词: ageing;binocular;monocular;summation;contrast sensitivity
数据来源: Taylor
摘要:
Binocular and monocular contrast sensitivities were measured at two spatial frequencies of 1 and 6 c/deg in 8 young (mean age 22.6±3.8 years) and 18 older subjects with normal healthy eyes (mean age 58.4±7.3 years). Data were analysed as binocular summation ratios defined as binocular CS/‘best eye’CS. Binocular summation ratios were higher for the younger group (1.46 and 1.48 for 1 and 6 c/deg respectively) compared to the older group who demonstrated a spatial frequency dependence (1.31 and 1.13 at 1 c/deg and 6 c/deg respectively). The results are discussed in terms of age-related cortical cell loss and increased monocular sensitivity differences between the two eyes.
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