Early teller acuity card estimates as predictors of long-term visual outcome in children with perinatal complications
Thesis (M.Sc.)--Memorial University of Newfoundland, 2000. Psychology Bibliography: leaves 68-82 In a previous study (Adams, Courage, Byars, & McKim, 1994), the Teller Acuity Cards (TAC) were used to assess binocular grating acuity in 349 infants between 2 and 42 months (M = 13.20 months, SD = 1...
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ftmemorialunivdc:oai:collections.mun.ca:theses3/120217 2023-05-15T17:23:32+02:00 Early teller acuity card estimates as predictors of long-term visual outcome in children with perinatal complications Hall, Heather Lynne, 1972- Memorial University of Newfoundland. Dept. of Psychology 2000 xiv, 128 leaves Image/jpeg; Application/pdf http://collections.mun.ca/cdm/ref/collection/theses3/id/120217 Eng eng Electronic Theses and Dissertations (14.38 MB) -- http://collections.mun.ca/PDFs/theses/Hall_HeatherLynne.pdf a1492500 http://collections.mun.ca/cdm/ref/collection/theses3/id/120217 The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries Visual acuity Vision disorders in children Text Electronic thesis or dissertation 2000 ftmemorialunivdc 2015-08-06T19:19:59Z Thesis (M.Sc.)--Memorial University of Newfoundland, 2000. Psychology Bibliography: leaves 68-82 In a previous study (Adams, Courage, Byars, & McKim, 1994), the Teller Acuity Cards (TAC) were used to assess binocular grating acuity in 349 infants between 2 and 42 months (M = 13.20 months, SD = 11.65). All of these children were at risk for abnormal visual/neurological development due to preterm birth and/or significant perinatal complications (e.g., birth asphyxia, seizures, respiratory distress syndrome). In the present study, 76 of these children were reassessed several years later with the TAC, as well as with a battery of spatial and non-spatial vision tests (M age at follow-up = 78.05 months, SD = 34.37, range: 35-122 months). Results of this assessment showed: (1) Compared to healthy, age-matched control children (n = 61) tested with the same battery of follow-up tests, at-risk children had consistently lower test scores, and a higher incidence of ocular disorders and refractive errors. However, most of these visual deficits were not serious. (2) Non-statistical analyses suggest that children who experienced perinatal seizures, bronchopulmonary dysplasia, pneumothorax or necrotizing enterocolitis had relatively poorer visual outcomes than children with other risk factors. (3) Correlational analyses show that an early measure of grating acuity was unrelated to follow-up grating acuity, nor to any other later measure of spatial or non- spatial vision. However, when both the early and follow-up results were categorized as either "normal" or "abnormal", an early TAC result did have high normal predictive value and specificity, but low abnormal predictive value and sensitivity for identifying children with and without visual disorders. These data imply that children who experienced significant perinatal risk factors are at some risk for mild, long-term visual deficits. However, predictions based upon a single estimate of Teller acuity must be made with caution, even when the initial results are normal. Thesis Newfoundland studies University of Newfoundland Memorial University of Newfoundland: Digital Archives Initiative (DAI) Tac ENVELOPE(-59.517,-59.517,-62.500,-62.500) |
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Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
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English |
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Visual acuity Vision disorders in children |
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Visual acuity Vision disorders in children Hall, Heather Lynne, 1972- Early teller acuity card estimates as predictors of long-term visual outcome in children with perinatal complications |
topic_facet |
Visual acuity Vision disorders in children |
description |
Thesis (M.Sc.)--Memorial University of Newfoundland, 2000. Psychology Bibliography: leaves 68-82 In a previous study (Adams, Courage, Byars, & McKim, 1994), the Teller Acuity Cards (TAC) were used to assess binocular grating acuity in 349 infants between 2 and 42 months (M = 13.20 months, SD = 11.65). All of these children were at risk for abnormal visual/neurological development due to preterm birth and/or significant perinatal complications (e.g., birth asphyxia, seizures, respiratory distress syndrome). In the present study, 76 of these children were reassessed several years later with the TAC, as well as with a battery of spatial and non-spatial vision tests (M age at follow-up = 78.05 months, SD = 34.37, range: 35-122 months). Results of this assessment showed: (1) Compared to healthy, age-matched control children (n = 61) tested with the same battery of follow-up tests, at-risk children had consistently lower test scores, and a higher incidence of ocular disorders and refractive errors. However, most of these visual deficits were not serious. (2) Non-statistical analyses suggest that children who experienced perinatal seizures, bronchopulmonary dysplasia, pneumothorax or necrotizing enterocolitis had relatively poorer visual outcomes than children with other risk factors. (3) Correlational analyses show that an early measure of grating acuity was unrelated to follow-up grating acuity, nor to any other later measure of spatial or non- spatial vision. However, when both the early and follow-up results were categorized as either "normal" or "abnormal", an early TAC result did have high normal predictive value and specificity, but low abnormal predictive value and sensitivity for identifying children with and without visual disorders. These data imply that children who experienced significant perinatal risk factors are at some risk for mild, long-term visual deficits. However, predictions based upon a single estimate of Teller acuity must be made with caution, even when the initial results are normal. |
author2 |
Memorial University of Newfoundland. Dept. of Psychology |
format |
Thesis |
author |
Hall, Heather Lynne, 1972- |
author_facet |
Hall, Heather Lynne, 1972- |
author_sort |
Hall, Heather Lynne, 1972- |
title |
Early teller acuity card estimates as predictors of long-term visual outcome in children with perinatal complications |
title_short |
Early teller acuity card estimates as predictors of long-term visual outcome in children with perinatal complications |
title_full |
Early teller acuity card estimates as predictors of long-term visual outcome in children with perinatal complications |
title_fullStr |
Early teller acuity card estimates as predictors of long-term visual outcome in children with perinatal complications |
title_full_unstemmed |
Early teller acuity card estimates as predictors of long-term visual outcome in children with perinatal complications |
title_sort |
early teller acuity card estimates as predictors of long-term visual outcome in children with perinatal complications |
publishDate |
2000 |
url |
http://collections.mun.ca/cdm/ref/collection/theses3/id/120217 |
long_lat |
ENVELOPE(-59.517,-59.517,-62.500,-62.500) |
geographic |
Tac |
geographic_facet |
Tac |
genre |
Newfoundland studies University of Newfoundland |
genre_facet |
Newfoundland studies University of Newfoundland |
op_source |
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries |
op_relation |
Electronic Theses and Dissertations (14.38 MB) -- http://collections.mun.ca/PDFs/theses/Hall_HeatherLynne.pdf a1492500 http://collections.mun.ca/cdm/ref/collection/theses3/id/120217 |
op_rights |
The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. |
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1766113129995960320 |