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KMID : 1011420120170030273
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Journal of Korean Ophthalmic Optics Society
2012 Volume.17 No. 3 p.273 ~ p.278
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Comparative Study of the Maximum Accommodative Amplitude in 20`s and 40`s Myopia
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Yun Jae-Hong
Hwang Hae-Young
Kim Soo-Woon
Kim Hyun-Mok
Son Jeong-Sik
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Abstract
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Purpose: Average of the maximum accommodation amplitude of myopia in different generation, early 20’s and early 40’s were compared according to gender, degree of myopia.
Methods: Maximum amplitude of accommodation for each 100 patients of early 20’s and 40’s were measured with push-up method. Maximum amplitude of accommodation expectations based on Hofstetter formula were classified into three groups of under, normal and excess.
Results: The average of amplitude of accommodation was 9.77~11.64 D (10.77±2.49 D) in early 20’s and 4.67~6.21 D (5.34±1.28 D) in early 40’s. In early 20’s, minimum expectations of amplitude of accommodation for under, normal and excess groups were 20%, 75%, and 5%, repectively. In early 40’s, excess and under groups were 5% and 18%, repectively, but there was no excess group.
Conclusions: According to increasing age, amplitude of accommodation of both age groups showed decreased, and no significant difference was found in degree of myopia with gender. Difference between mean of expected accommodation amplitude and maximum of accommodation amplitude was compared, and it was found that maximum of accommodation amplitude of 20’s was smaller than mean of expected accommodation. From the result, it was expected that people in early 20’s who have more working times might have festinated accommodative insufficiency than 40’s
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KEYWORD
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The maximum amplitude of accommodation, Presbyopia, Push-up method
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