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Developmental Changes in Anterior Corneal Astigmatism in Tohono O’odham Native American Infants and Children

Developmental Changes in Anterior Corneal Astigmatism in Tohono O’odham Native American Infants and Children

Authors :
Joseph M. Miller
Erin M. Harvey
Duane L. Sherrill
Jim Schwiegerling
Velma Dobson
Dawn H. Messer
Source :
Ophthalmic Epidemiology. 20:102-108
Publication Year :
2013
Publisher :
Informa UK Limited, 2013.

Abstract

Purpose: To describe change in corneal astigmatism in infants and children of a Native American tribe with a high prevalence of astigmatism.Longitudinal measurements of corneal astigmatism were obtained in 960 Tohono O'odham children aged 6 months to8 years. Change in corneal astigmatism (magnitude (clinical notation), J0, J45) across age in children with high astigmatism (≥2 diopter (D) corneal astigmatism) or low/no astigmatism (2 D corneal astigmatism) at their baseline measurement was assessed.Regression analyses indicated that early in development (6 months to3 years), astigmatism magnitude decreased in the high astigmatism group (0.37 D/year) and remained stable in the low/no astigmatism group. In later development (3 to8 years), astigmatism decreased in the high (0.11 D/year) and low/no astigmatism groups (0.03 D/year). In 52 children who had data at all three of the youngest ages (6 months to1 year, 1 to2 years, 2 to3 years) astigmatism decreased after infancy in those with high astigmatism (p = 0.021), and then remained stable from age 1-2 years, whereas astigmatism was stable from infancy through age 1 year and increased from age 1-2 years in the low/no astigmatism group (p = 0.026). J0 results were similar, but results on J45 yielded no significant effects.The greatest change occurred in highly astigmatic infants and toddlers (0.37 D/year). By age 3 years, change was minimal and not clinically significant. Changes observed were due primarily to change in the J0 component of astigmatism.

Details

ISSN :
17445086 and 09286586
Volume :
20
Database :
OpenAIRE
Journal :
Ophthalmic Epidemiology
Accession number :
edsair.doi.dedup.....39564d579354b918ad00aebfa886d560
Full Text :
https://doi.org/10.3109/09286586.2013.767355