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Centre for Policy on Ageing | |
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Binocular vision in older people with adventitious visual impairment
— sometimes one eye is better than two | | Author(s) | Jocelyn Faubert, Olga Overbury |
| Journal title | Journal of the American Geriatrics Society, vol 48, no 4, April 2000 |
| Pages | pp 375-380 |
| Keywords | Visual impairment ; Canada. |
| Annotation | The study examined the effect of adventitious visual impairment (low vision) on monocular and binocular spatial contrast sensitivity in older people. Participants were 59 older adults aged 50-96 recruited at the McGill Low Vision Center, Montreal; 49 of them had age-related macular degeneration (AMD). In almost half of those with AMD, the sensitivity to spatial information, as measured by spatial contrast sensitivity, is worse when both eyes are used than when the stimuli are viewed with only one eye. This "binocular inhibition" is not related to the contrast sensitivity of the better eye or to acuities. Furthermore, this inhibition process is reflected primarily in images with medium to low spatial frequency components (medium to large size bars). These results have important implications for understanding the functional impact of low vision in older people. They suggest that almost half of older people with AMD view the world best using only one of their eyes, whereas for the other half, there is an advantage to using binocular vision for certain visual tasks. (RH). |
| Accession Number | CPA-000824206 A |
| Classmark | BR: 7S |
Data © Centre for Policy on Ageing |
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| ...from the Ageinfo database published by Centre for Policy on Ageing. |
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