• Journal of Korean Ophthalmic Optics Society
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• v.21 no.2
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• pp.127-135
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• 2016

Purpose: The present study was aimed to investigate the effect of excessive near work by using a smartphone on subjective symptoms and accommodative and convergent function in their 40s. Methods: A total of 40 subjects(male, 10; female, 30; age, $43{\pm}7.2year$) in their 40s who have monocular and binocular visual acuities of 0.8 and 1.0, respectively, were divided into presbyopia group and non-presbyopia group. The subjects were asked to watch a movie on the screen of smartphone for 30 minutes. Their accommodative amplitude and facility, and relative accommodation were measured and compared before and after the use of smartphone. Changes in fusional vergence and near heterophoria by using smartphone were also evaluated. Furthermore, the change of subjective symptoms was surveyed using a questionnaire. Results: The presbyopia in mid-40s reported discomfort in an order of asthenopia, blur and dryness after the use of smartphone. Accommodative function and non-strabismic binocular function were generally decreased. Accommodative functions such as monocular accommodative amplitude, and relative accommodation were significantly decreased after smartphone use, and the change of phoria was observed as a result of decreased convergence and divergence. Negative fusional vergence was also significantly reduced. On the other hand, non-presbyopia in mid-40s reported discomfort in an order of asthenopia, dryness and blur, and only accommodative amplitude among the accommodative functions was significantly reduced. Significant reduction of negative fusional vergence was also observed. Conclusion: From the results, it was confirmed that the subjective discomfort of mid-40s after smarphone use might be related to whether presbyopia or not. It was due to not only the reduction of accommodative function but also the overall deterioration of visual function including heterophoria and fusional vergence. Therefore, it suggests that the accurate determination of the cause based on the overall visual functional tests such as heterophoria, fusional vergence as well as the decrease of accommodation due to the aging may be necessary when the mid-40s feels discomfortable symptoms by near work.

• Journal of Acupuncture Research
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• v.23 no.3
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• pp.21-35
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• 2006

Objectives : Herniation of Nucleus Pulposus(HNP) of Cervical is the most important reason that causes Cervical pain. The aim of this study is to investigate the effectiveness of Carthmi-Flos Herbal acua-acupuncture therapy for Cervical disc Herniation patients. Methods : To evaluate the effectiveness of Carthmi-Flos Herbal acua-Acupuncture Therapy, 20 patients were treated by Carthmi-Flos Herbal acua-acupuncture therapy. To estimate the efficacy of treatment, we used Quardruple Visual Analog Scale (QVAS). Results & Conclusion : 1. As a objectivity treatment record, they test treatment record good 35%, fair 35%, excellent 30%. 2. After Carthmi-Flos acua-acupuncture therapy, pain rate changed from 8.80 to 5.40 3. By the results which puts out the statistics in sex , a pain rate of male changed from 8.57$({\pm}1.51)$ to 2.71$({\pm}2.63)$, a pain rate of female 8.92$({\pm}0.95)$ to 3.77$({\pm}2.09)$. Intentional difference is none as a therapy. 4. By the results which puts out the statistics in age, after forties changed from 9.07$({\pm}0.88)$ to 3.80$({\pm}2.43)$ and before forties changed from 8.00$({\pm}1.58)$ to 2.20$({\pm}1.30)$. Intentional difference is none as a therapy. 5. By the results which puts out the statistics in Duration, pain rate of the acutest group changed from 8.36$({\pm}1.12)$ to 2.18$({\pm}1.08)$, pain rate of the subacute group changed from 9.80$({\pm}0.45)$, to 5.20$({\pm}2.68)$, pain rate of the chronic group changed from 8.67$({\pm}1.53)$ to 3.33$({\pm}1.53)$. Intentional difference is none as a therapy. 6. By the results which puts out the statistics in the reading of Lumbar MID, pain rate of the Bulging type changed from 9.00$({\pm}1.05)$ to 4.30$({\pm}2.67)$, pain rate of the Protruded type changed from 8.50$({\pm}1.00)$, to 3.50$({\pm}1.29)$, pain rate of the Extruded type changed from 6.00 to 1.00, pain rate of the Mixed type changed from 9.20$({\pm}0.84)$ to 2.00$({\pm}1.23)$, Intentional difference is none as a therapy.

• 한국노년학
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• v.30 no.4
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• pp.1225-1237
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• 2010

This study aims to analyze the factors affecting consumption inequality in the 10 years following the financial crisis, applying the cohort method on the data for the first to the eleventh wave of the Korean Labor and Income Study produced by the Korean Labor Institute. The study found that consumption inequality increased rapidly immediately following the financial crisis, and then decreased gradually until increasing again from 2005 onward. Analyzed in terms of age-time-cohort effects, there was a significant change in consumption inequality around the age of mid-forties, and the decrease in consumption inequality was smaller in the younger generations than in the older ones. This suggests that as the current younger generations age over time, consumption inequality may become greater. Also, when the factors in population-cohort-age effects from 1998 onward are analyzed, the age effect in consumption inequality becomes smaller, whereas the role of the rising average age due to demographic shifts seems to be increasing. This means that consumption inequality may become a serious problem in the rapidly aging society. Therefore, there is a need to consider ways to bolster social security and to provide further public assistance in the low-income retiree.