Task complexity and visual acuity in senile macular degeneration
The effects of choice of test object and inter-symbol spacing (contour interaction) on the measurement of low visual acuities was investigated. Visual acuities of sixteen subjects with senile macular degeneration and five age-matched normal subjects were measured using different test targets of varying complexities. Visual acuity of both groups of subjects decreased with increasing task complexity but the trend was more marked for the low vision subjects. However, within the low vision group, the complexity effect was not dependent on the level of visual acuity. This study showed that visual acuity of persons with senile macular degeneration can be measured equally well with single letters, constant contour interaction Landolt rings, or the Bailey-Lovie letter chart but the test used should be specified. Grating targets and word charts measure different visual functions from standard visual acuity tests.
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|Item Type:||Journal Article|
|Additional Information:||For more information, please refer to the journal’s website (see link) or contact the author. Author contact details: email@example.com|
|Keywords:||visual acuity, senile macular degeneration, low vision|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)|
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
|Copyright Owner:||Copyright 1981 Optometrists Association Australia|
|Deposited On:||01 Dec 2006|
|Last Modified:||15 Jan 2009 07:16|
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