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Centre for Policy on Ageing | |
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Aging effects on the identification of digitally blurred text, scenes and faces
— evidence for optical compensation for everyday tasks in the senescent eye | | Author(s) | Paul R Bartel, Donald W Kline |
| Journal title | Ageing International, vol 27, no 2, Spring 2002 |
| Pages | pp 56-72 |
| Keywords | Visual impairment ; Cognitive processes ; Young adults [20-25] ; Age groups [elderly] ; Comparison ; Canada. |
| Annotation | When older observers are de-focused optically to the same reduced acuity levels as their younger adult counterparts, they are better able to read distant text. This study sought to determine if this ability extended to intrinsically blurred (i.e. image-processed) stimuli of different types. 12 young (aged 20 to 27) and 12 older (aged 61 to 73) healthy community-dwelling adult observers with excellent acuity were compared on their ability to identify low-pass filtered real words, nonsense words, scenes and faces arranged in a sequence of decreasingly blurred images. Young observers were able to identify the images correctly earlier in the blur sequence than their older counterparts. This finding suggests that compensatory changes in the eye's optical media rather than the older observer's greater experience with blur accounts for their superior legibility performance with optically de-focused text. While the image-enhancing effects of the age-related decline in pupil size (senile miosis) may be involved, further research is needed to clarify the mechanism(s) underlying this ability. (RH). |
| Accession Number | CPA-020905207 A |
| Classmark | BR: DA: SD6: BB: 48: 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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