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KMID : 1159320140160030261
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Korean Journal of Vision Science
2014 Volume.16 No. 3 p.261 ~ p.271
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Refractive Changes as a Function of Age in a Optician’s Clinical Population in Seoul Area
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You Sun-A
Lee Koon-Ja
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Abstract
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Purpose: To characterize refractive changes in ametropic eyes with age, all records from clinical patients at an KE optician’s clinic in the year of 2007~2013 were used for the study.
Methods: Refractive errors were decomposed into spherical-equivalent refractive error (SE), (myopia, SE≤-0.75 D; hyperopia, SE≥+0.75 D). Astigmatic groups were categorized by the cyl≥-1.00 D and were classified by the with-the-rule (WTR), against-the-rule (ATR), and oblique astigmatism. Subjects were divided into six age group by decade(10s, 20s, 30s, 40s, 50s, and 60s). Statistical analysis were performed with the SPSS/win programs (version 18.0; SPSS, Inc.) and Origin 8.0. P-value of less than 0.05 was considered to be statistically significant.
Results: Among the subjects, 84.4.% had myopia, 5.7% had hyperopia, and 46.1% had astigmatism. Average of SE was -3.55±2.83 D and the mean of SE of the six age group by decade were 10s, -3.77±2.06 D; 20s, -4.44±2.61 D; 30s, -3.85±2.61 D; 40s, -3.48±2.70 D; 50s, -1.92±2.65 D; 60s, -0.56±2.58 D that progressively shift from myopia to hyperopia as age progresses. The prevalence of WTR astigmatism is 54.8% and oblique astigmatism is 30.4% and ATR astigmatism is 14.9%. And WTR astigmatism was highly dominant in teen age group, while 45.3% of the 60s were ATR astigmatism.
Conclusions: In adolescence, a prevalence rates of both myopia and WTR astigmatism is increased during the first decades. Majority of the elderly (over 60s) had hyperopia and ATR astigmatism. Age-related refractive changes in eyes showed myopic shift in adolescence, however showed an age-related hyperopic shift after 40s in both myopic and emmetropic eyes. In myopic eyes myopic and hyperopic shift are larger than emmetropic eyes.
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KEYWORD
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Refractive changes, Myopic shift, Hyperopic shift, Shift to against the rule astigmatism
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