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- W25933629 abstract "Functional vision refers to the use of vision to perform day-day tasks and is assessed by the ability to perform these tasks. Assessment of functional vision is an integral component of the management of children with visual impairment. The results of the assessment help in designing appropriate educational and rehabilitation intervention strategies. The L V Prasad-Functional Vision Questionnaire (LVP-FVQ) is a reliable and valid tool for assessing self-reported functional vision performance (FVP) in children. Self-reports are obviously the child's perception of his or her ability to perform certain tasks but they may not reflect actual performance. Various studies of FVP in adults have used actual performance measures of everyday tasks, but very few studies, even in adults with visual impairment, have compared self-reports and performance measures and none have included identical tasks on the 2 methods of assessment. To date, no study has assessed FVP using performance measures of daily tasks in the paediatric population. Therefore, the aims of the current study were: (1) To develop performance measures of FVP and compare them with self-reports of FVP from the LVP-FVQ in a prospective cohort of Indian school-going children with visual impairment. (2) To investigate the effect of a psychological attribute, self-concept, on self-reports, performance measures and the relationships between the 2 measures. (3) To investigate the relationship between clinical measures of vision and FVP. Performance measures of FVP for children with visual impairment were developed for 17 day to day tasks for comparison with self-reports of the same tasks for the LVP-FVQ. The LVP-FVQ was verbally administered by the researcher to 178 Indian school-going children aged between 8 and 17 years with visual impairment. Similarly, the performance of each of the tasks by these children was measured by the researcher. The performance measures for most of these tasks were recorded on continuous scales and later categorized to match the ordinal ratings from the LVP-FVQ. The self-report and performance measure ratings for the 17 tasks were then converted into the same metric using a Rasch model allowing an accurate picture of whether and how these two measures of FVP compared with each other. Rasch analysis was used to estimate the person ability and item difficulty for FVP from the 2 methods of assessment. Self-reports showed stronger correlations with performance measures of FVP than were hypothesized. Similar to some studies in adults, binocular high-contrast visual acuity was found to be the single most significant predictor of a child's functional vision performance. Contrary to expectations, self-concept did not have a significant effect on the relationship between the 2 measures. A few reasons for the stronger than expected relationship between the 2 methods of assessment of FVP in children with visual impairment are suggested. Firstly, the use of identical tasks for self-reports and performance measures of FVP is likely to improve the relationship. Secondly, the LVP-FVQ was developed using focus groups of children with visual impairment, their parents, low vision specialists and rehabilitation professionals leading to good content validity. Since children were included in the development of the LVP-FVQ, the tasks were representative of a child's typical daily life. Thus, the performance measures were also suited to the day-day tasks of school-going children but were not tapping any social and psychological issues relating to visual impairment. Thirdly, the use of Rasch analysis which addresses many of the issues of unequal measurement and defines a hierarchy of items for self-reports and performance measures could have led to higher correlations in the present study. Finally, the high reliability and validity of self-reports and performance measures of FVP in the present study may have contributed to the higher than expected correlations. None of the demographic variables or self-concept affected the relationship between self-reports and performance measures of FVP, but self-concept had a weak significant association with self-reports. This result is unique to this study and warrants further investigation. Binocular high-contrast visual acuity alone, the most common visual function measured in ophthalmic clinics, explained between one-third and two-thirds of the variance in functional vision performance. This confirms the expected trend that with worse visual impairment, FVP is lower. The addition of the variable, self-concept, resulted in a very small increase in the variability explained for self-reported FVP. Similarly, the addition of other clinical measures of vision such as binocular low contrast visual acuity and colour vision resulted in a small increase in the variability explained for performance measures of FVP. The correlation between binocular high-contrast visual acuity and performance measures of FVP was statistically significantly higher than that between binocular high-contrast visual acuity and self-reports of FVP. There are a few possible reasons for this higher correlation. Firstly, performance measures are considered to be a more objective form of assessment, while self-reports are a child's perception of his or her ability and therefore lack a context, which may result in either over-estimation or under-estimation of actual ability. Furthermore, performance measures include dimensions such as the time taken to perform a task or other criteria specific to a task, while self-reports do not use such qualifiers. Secondly, the higher correlation may be the result of the visual complexity of some of the tasks. While self-concepts of children with visual impairment played a small but significant role in the self-reported FVP, studies in adults with visual impairment have suggested that other psychological factors such as mood, anxiety, motivation etc. are associated with an individual's perception of visual performance. Future studies are required to explore the possible role of these and other factors in FVP in Indian school-going children with visual impairment. This thesis makes a significant contribution to the field of paediatric low vision rehabilitation by providing performance measures of FVP and relating them to self-reports in children with visual impairment and their relationship with common measures of visual function. With self-reports, the child is reporting his or her perception of ability to complete a task, where performance measures examine the child's ability to complete a task by observing his or her performance. Thus, although the two methods are comparable, it is because of the different yields from each of these measures that they are not considered interchangeable. A combination of the 2 measures where practical would perhaps provide a richer depiction of the FVP of children with visual impairment. As developing countries such as India have limited resources allocated for eye care services where less than seven percent of the gross national product is spent on health care, self-reports can be utilized together with clinical measures of vision (mainly visual acuity) to assess the FVP in children with visual impairment in a community setting. However, both methods of assessment of FVP together with clinical measures of vision are essential if a comprehensive assessment of FVP is to be carried out in children with visual impairment. Information from these assessments can help clinicians better understand the functioning of children with visual impairment and incorporate them in the management of low vision in school-going children with visual impairment in India." @default.
- W25933629 created "2016-06-24" @default.
- W25933629 creator A5084101397 @default.
- W25933629 date "2007-01-01" @default.
- W25933629 modified "2023-09-23" @default.
- W25933629 title "Functional vision performance in Indian school-going children with visual impairment" @default.
- W25933629 cites W123795227 @default.
- W25933629 cites W1499837151 @default.
- W25933629 cites W1510562358 @default.
- W25933629 cites W1582972609 @default.
- W25933629 cites W1594530557 @default.
- W25933629 cites W1641725824 @default.
- W25933629 cites W1642817920 @default.
- W25933629 cites W1845530645 @default.
- W25933629 cites W1880036320 @default.
- W25933629 cites W189973038 @default.
- W25933629 cites W1963510519 @default.
- W25933629 cites W1965499295 @default.
- W25933629 cites W1966176134 @default.
- W25933629 cites W1966447913 @default.
- W25933629 cites W1967214170 @default.
- W25933629 cites W1967275832 @default.
- W25933629 cites W1968535149 @default.
- W25933629 cites W1969600384 @default.
- W25933629 cites W1972997958 @default.
- W25933629 cites W1973202291 @default.
- W25933629 cites W1973213541 @default.
- W25933629 cites W1976111747 @default.
- W25933629 cites W1976290839 @default.
- W25933629 cites W1979435410 @default.
- W25933629 cites W1980191174 @default.
- W25933629 cites W1985745514 @default.
- W25933629 cites W1985932611 @default.
- W25933629 cites W1986303759 @default.
- W25933629 cites W1994191243 @default.
- W25933629 cites W1994604549 @default.
- W25933629 cites W1996133734 @default.
- W25933629 cites W199735706 @default.
- W25933629 cites W2001035404 @default.
- W25933629 cites W2003173508 @default.
- W25933629 cites W2003190719 @default.
- W25933629 cites W2007626415 @default.
- W25933629 cites W2008457577 @default.
- W25933629 cites W2014803585 @default.
- W25933629 cites W2018544594 @default.
- W25933629 cites W2029401430 @default.
- W25933629 cites W2030499378 @default.
- W25933629 cites W2030730521 @default.
- W25933629 cites W2031154747 @default.
- W25933629 cites W2031213839 @default.
- W25933629 cites W2031748535 @default.
- W25933629 cites W2036815862 @default.
- W25933629 cites W2041664860 @default.
- W25933629 cites W2046794466 @default.
- W25933629 cites W2047609053 @default.
- W25933629 cites W2048000714 @default.
- W25933629 cites W2053547527 @default.
- W25933629 cites W2054905233 @default.
- W25933629 cites W2061684075 @default.
- W25933629 cites W2064799866 @default.
- W25933629 cites W2065039771 @default.
- W25933629 cites W2076343680 @default.
- W25933629 cites W2079534743 @default.
- W25933629 cites W2081651663 @default.
- W25933629 cites W2083050940 @default.
- W25933629 cites W2089214141 @default.
- W25933629 cites W2089579659 @default.
- W25933629 cites W2089871276 @default.
- W25933629 cites W2092079940 @default.
- W25933629 cites W2095262107 @default.
- W25933629 cites W2095698041 @default.
- W25933629 cites W2096657471 @default.
- W25933629 cites W2104872013 @default.
- W25933629 cites W2109589194 @default.
- W25933629 cites W2111096139 @default.
- W25933629 cites W2112519660 @default.
- W25933629 cites W2113346546 @default.
- W25933629 cites W2115291609 @default.
- W25933629 cites W2123702468 @default.
- W25933629 cites W2124789365 @default.
- W25933629 cites W2129246166 @default.
- W25933629 cites W2129464141 @default.
- W25933629 cites W2129808266 @default.
- W25933629 cites W2130713932 @default.
- W25933629 cites W2134954483 @default.
- W25933629 cites W2139422647 @default.
- W25933629 cites W2141403362 @default.
- W25933629 cites W2141614068 @default.
- W25933629 cites W2142887891 @default.
- W25933629 cites W2151231052 @default.
- W25933629 cites W2153459977 @default.
- W25933629 cites W2159530261 @default.
- W25933629 cites W2166383050 @default.
- W25933629 cites W2167290013 @default.
- W25933629 cites W2170467812 @default.
- W25933629 cites W2321399050 @default.
- W25933629 cites W2334703620 @default.
- W25933629 cites W2341192348 @default.
- W25933629 cites W2345852888 @default.
- W25933629 cites W2410797419 @default.