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KMID : 1159320080100020087
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Korean Journal of Vision Science
2008 Volume.10 No. 2 p.87 ~ p.97
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The survey of environmental factors by questionnaries with refractive state rural and urban elementary schoolchildren
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Yun Mi-Ok
Eom Jung-Hee
Mah Ki-Choong
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Abstract
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Purpose: To analyze environmental factors on the refractive state of rural and urban elementary schoolchildren.
Methods: The subjective refraction and questionnaire were performed to 166 children at 3 schools in rural and 1 school in urban Gyeongsangnamdo (low grade : n=36, high grade : n=47).
Results: The means of uncorrected visual acuity were 0.75±0.34 in the rural and 0.45±0.38 in the urban. In the low grade of elementary schoolchildren, the means of uncorrected visual acuity were 0.54±0.37 in the rural and 0.84±0.25 in the urban. In the high grade of elementary schoolchildren, the means of uncorrected visual acuity were 0.68±0.39 in the rural and 0.39±0.38 in the urban. There were significant differences between the place of residence and school year. The means of spherical equivalent refraction were -0.52±1.02D in the rural and -1.60±1.80D in the urban. In the low grade of elementary schoolchildren, the means of uncorrected visual acuity were -0.14±0.482D in the rural and -0.973±1.315D in the urban. In the high grade of elementary schoolchildren, the means of uncorrected visual acuity were -0.81±1.210D in the rural and -2.08±1.98D in the urban. There were significant differences between the place of residence and school year. There was investigated by questionnaire survey for environmental factors having influence upon visual acuity as well as management of visual acuity. There were significant differences between the rural and urban children, such as the period of refraction, place of visual function examination, the first time of glasses wearing, type of illumination on reading, studying time, and duration of watching TV on weekdays.
Conslusions: Subnormal visual acuity(the prevalence of spectacle wearing and myopia) was greater as in the higher grade and in the urban children. It must be related with environmental factors than congenital factors. So multilateral vision care promotion program should be developed to prevent subnormal visual acuity and keep vision care.
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KEYWORD
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uncorrected visual acuity, refractive error, questionnaires, environmental factor, management of visual acuity
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