Psychologists from the University of Leicester have carried out eye tests to examine reading styles in young and old people and say there isn't just an eyesight issue - the way we read words changes as we grow older.
They digitally manipulated text, combined with precise measures of readers' eye movements, and say this provided new insight into how young and older adults use different visual cues during reading. Their experiments used precise measures of readers' eye movements to assess how well they read lines of text that had been digitally manipulated to enhance the salience of different visual information - sometimes the text was blurred and other times the features of the individual letters were sharply defined.
The results showed that young adults ages 18-30 years found it easiest to read lines of text when the fine visual detail was present but this was more difficult for adults 65 and over - but older people found it easier to read more blurred text. These findings support the view that older adults use a different reading strategy from younger adults and that they rely more than young adults on holistic cues to the identities of words, such as word shape.
The research makes an important contribution to understanding why older people have difficulty in reading. The findings will promote further work to more fully understand this difficulty.
Dr. Kevin Paterson from the University of Leicester said, "The findings showed that the difficulty older readers often experience is likely to be related to a progressive decline in visual sensitivity, particularly for visual detail, due to optical changes and changes in neural transmission even in individuals with apparently normal vision.
"However, the findings also showed that older readers comprehended text just as accurately as younger readers. Consequently, although normal aging clearly leads to important changes in reading behavior, it seems that adaptive responses to the changing nature of the visual input may help older adults to read and understand text efficiently well into later life."
The research sought to understand how changes that take place in the eye and brain as a result of the normal aging process affect reading.
Paterson said, "As we get older, we lose visual sensitivity, particularly to fine visual detail, due to changes in the eye and changes in neural transmission. This loss of visual sensitivity is found even in individuals with apparently normal vision and is not corrected by optical aids, such as glasses or contact lenses. However, it is likely to have consequences for reading.
"The ability to read effectively is fundamental to participation in modern society, and the challenge age-related visual impairment presents to meeting everyday demands of living, working and citizenship is a matter of concern. The difficulty older adults have in reading is an important contributing factor to social exclusion. The RNIB has identified age-related reading difficulty amongst the over 65s as highly detrimental to quality of life and a barrier to employment.
"The fact that people have greater difficulty in reading as they get older limits their ability to engage in everyday activities (e.g., reading the newspaper, a utility bill, or the instructions on a medicine bottle), to continue to work, to read for leisure, to access education and knowledge, and to interact with others. Being able to understand the causes of this reading difficulty is an important first step to identifying ways to combat it.
"With an aging population and a rising retirement age, it is clear such problems pose serious economic and social challenges for the future. Consequently, research on this topic is likely to become increasingly important and both understanding and combating age-related visual impairment will be important for reducing social exclusion in the elderly."