●AIM:To assess the influence of near work,time outdoor and parental myopia on the prevalence of myopia in school children in Aba,Nigeria.●METHODS:Primary and secondary school children aged between 8 and 15 y were ra...●AIM:To assess the influence of near work,time outdoor and parental myopia on the prevalence of myopia in school children in Aba,Nigeria.●METHODS:Primary and secondary school children aged between 8 and 15 y were randomly recruited from 12 schools in Aba.Information on family history,near work and outdoor activity was obtained using myopia risk factor questionnaire.Cycloplegic refraction was performed using autorefraction technique.Myopia was defined as spherical equivalent refraction(SER)≤-0.50 D in the poorer eye.Data were analysed for 1197(male:538 and female:659)children with full relevant data.●RESULTS:Risk of developing myopia was positively associated with parental myopia[odds ratio(OR):6.80;95%CI,2.76-16.74;P<0.01)for one myopic parent and(OR:9.47;95%CI,3.88-23.13;P<0.01)for two myopic parents,longer daily reading hour(OR:1.21;95%CI,1.03-1.42;P=0.02)and less time outdoors(OR:0.8;95%CI,0.74-0.87;P<0.01).●CONCLUSION:Parental history of myopia is the most important risk factor associated with myopia.In addition,children with both parents being myopic has increased odds of developing myopia than those with one myopic parent.It is recommended therefore,that children spend more time outdoors as this could reduce the prevalence and progression of myopia.展开更多
Background/Aims: Juvenile myopia is a serious problem in China, the prevalence of which stays at a high level and shows an upward trend. The target of this study was to explore the factors associated with myopia in Ch...Background/Aims: Juvenile myopia is a serious problem in China, the prevalence of which stays at a high level and shows an upward trend. The target of this study was to explore the factors associated with myopia in Chinese children. Methods: A cross-sectional analysis in a random sample survey was conducted in Beijing in 2008. The data collected from 15,316 Chinese school students aged 6 to 18 years, randomly selected from 19 schools were evaluated, including noncycloplegic refraction and possible genetic, environmental and behavioral factors, to explore the key risk factors for myopia. Univariate and multiple logistic regression analyses were performed to compare the OR values, and receiver operator characteristic (ROC) curves were generated to compare the differences among the areas under the ROC curves using the method of multiple comparison with the best. Results: Myopia was associated with shorter sleep times versus longer sleep times (adjusted OR = 3.37;95%CI 3.07-3.70), and the multivariate OR for two compared with no parents with myopic was 2.83 (95%CI 2.47-3.24) and 1.95 (95%CI 1.69-2.24) for reading or writing distances less than33 cmcompared to distances greater than33 cm. Controlling for other factors, children that slept for shorter periods of time had significantly more myopic refractions (?1.69D vs ?1.29D for children with longer sleeping time per day). Analysis of the areas under the ROC curves showed five variables with predictable values better than chance: age, sleeping time, reading or writing distance, hours of studying, and parental myopia. Conclusion: It was not surprising, as proved by other studies, that parental myopia, reading or writing distances, time spent on studying or other activities by using eyes were dominant risk factors associated with juvenile myopia. Our findings indicated that hours of sleeping were also closely related to juvenile myopia, in which the underlying mechanism should be explored in the future study.展开更多
The deficiency theories of dyslexia are quite contradictory and the cross-cultural studies in recent years mainly focused on whether the dyslexics among cultures shared the same cognitive profile or just based on the ...The deficiency theories of dyslexia are quite contradictory and the cross-cultural studies in recent years mainly focused on whether the dyslexics among cultures shared the same cognitive profile or just based on the language.This study used Near-Infrared Spectroscopy (NIRS) imaging to measure the regional cerebral blood volume (BV) and the changes of cerebral activation in the left prefrontal cortex of 12 Chinese dyslexic children and their 12 age-matched normal controls during the Paced Vis-ual Serial Addition Test (PVSAT).Results showed that the scores of PVSAT of dyslexic children were significantly lower than those of the normal children (t=3.33,P<0.01).The activations of the left pre-frontal cortex in the normal group were significantly greater than those of dyslexic children (all P<0.01).Our results indicated that Chinese dyslexia had a general deficiency in working memory and this may be caused by the abnormal metabolic activity of brain blood volume in the left prefrontal cortex and the deficits in brain function might be the basis of neuropathology of Chinese dyslexia.Present study sup-ports the difference on brain activation of dyslexics from different languages may be caused by the same cognitive system related to reading.展开更多
<strong>Background:</strong> To determine the induced refractive error among the readymade garment workers. Those who are working in the knitting section and those who are working other than the knitting a...<strong>Background:</strong> To determine the induced refractive error among the readymade garment workers. Those who are working in the knitting section and those who are working other than the knitting and computer section. <strong>Methods:</strong> It was a prospective cross-sectional analytic study among 600 workers in 2 factories at Joydevpur, Gazipur, Bangladesh on January 2020. Group: A comprises 300 workers who were working at knitting section for a minimum of six hours a day and 5 days a week. Group: B comprises another 300 workers who were appointed for loading-unloading, care-taker, driver and security guard also. Prevalence of refractive error in two groups was compared. <strong>Results:</strong> The mean age of participants in group: A was 26.61 ± 4.99 (CI 95%, 26.04 ± 27.18) and in group: B was 28.51 ± 5.69 (95% CI 27.86 ± 29.15). Prevalence of refractive error between two groups was 52 and 28.3 respectively. The chi-square statistic is 44.9775. The p-value is <0.00001. Significant at p < 0.05. Strong positive correlation shows in Pearson’s correlation between time duration of knitting and refractive error (R is: 0.7619). Visual acuity between two groups chi-square statistic is 33.1866. The p-value is <0.00001. Significant at p < 0.05. <strong>Conclusion:</strong> Knitting workers at readymade garment (RGM) are more prone to develop late onset myopia than other workers in the same premises.展开更多
研究近场通信(Near Field Communication,NFC)技术在配电架空线路带电抢修作业中的应用。通过分析NFC技术原理,结合配电线路抢修工作需求,设计基于NFC技术的智能化抢修管理系统,将NFC标签植入线路设备、杆塔、关键连接点,实现设备身份...研究近场通信(Near Field Communication,NFC)技术在配电架空线路带电抢修作业中的应用。通过分析NFC技术原理,结合配电线路抢修工作需求,设计基于NFC技术的智能化抢修管理系统,将NFC标签植入线路设备、杆塔、关键连接点,实现设备身份快速识别、巡检数据实时采集。应用结果表明,该技术能够提高抢修效率,降低安全风险,为配电线路智能化运维提供技术支持。展开更多
基金Supported by the University of KwaZulu-Natal(UKZN)Developing Research Innovation,Localisation and Leadership in South Africa(DRILL).DRILL,is a NIH D43 grant(D43TW010131)awarded to UKZN in 2015 to support a research training and induction programme for early career academics.
文摘●AIM:To assess the influence of near work,time outdoor and parental myopia on the prevalence of myopia in school children in Aba,Nigeria.●METHODS:Primary and secondary school children aged between 8 and 15 y were randomly recruited from 12 schools in Aba.Information on family history,near work and outdoor activity was obtained using myopia risk factor questionnaire.Cycloplegic refraction was performed using autorefraction technique.Myopia was defined as spherical equivalent refraction(SER)≤-0.50 D in the poorer eye.Data were analysed for 1197(male:538 and female:659)children with full relevant data.●RESULTS:Risk of developing myopia was positively associated with parental myopia[odds ratio(OR):6.80;95%CI,2.76-16.74;P<0.01)for one myopic parent and(OR:9.47;95%CI,3.88-23.13;P<0.01)for two myopic parents,longer daily reading hour(OR:1.21;95%CI,1.03-1.42;P=0.02)and less time outdoors(OR:0.8;95%CI,0.74-0.87;P<0.01).●CONCLUSION:Parental history of myopia is the most important risk factor associated with myopia.In addition,children with both parents being myopic has increased odds of developing myopia than those with one myopic parent.It is recommended therefore,that children spend more time outdoors as this could reduce the prevalence and progression of myopia.
文摘Background/Aims: Juvenile myopia is a serious problem in China, the prevalence of which stays at a high level and shows an upward trend. The target of this study was to explore the factors associated with myopia in Chinese children. Methods: A cross-sectional analysis in a random sample survey was conducted in Beijing in 2008. The data collected from 15,316 Chinese school students aged 6 to 18 years, randomly selected from 19 schools were evaluated, including noncycloplegic refraction and possible genetic, environmental and behavioral factors, to explore the key risk factors for myopia. Univariate and multiple logistic regression analyses were performed to compare the OR values, and receiver operator characteristic (ROC) curves were generated to compare the differences among the areas under the ROC curves using the method of multiple comparison with the best. Results: Myopia was associated with shorter sleep times versus longer sleep times (adjusted OR = 3.37;95%CI 3.07-3.70), and the multivariate OR for two compared with no parents with myopic was 2.83 (95%CI 2.47-3.24) and 1.95 (95%CI 1.69-2.24) for reading or writing distances less than33 cmcompared to distances greater than33 cm. Controlling for other factors, children that slept for shorter periods of time had significantly more myopic refractions (?1.69D vs ?1.29D for children with longer sleeping time per day). Analysis of the areas under the ROC curves showed five variables with predictable values better than chance: age, sleeping time, reading or writing distance, hours of studying, and parental myopia. Conclusion: It was not surprising, as proved by other studies, that parental myopia, reading or writing distances, time spent on studying or other activities by using eyes were dominant risk factors associated with juvenile myopia. Our findings indicated that hours of sleeping were also closely related to juvenile myopia, in which the underlying mechanism should be explored in the future study.
基金supported by a grant from National Natural Science Foundation of China (No. 30872132)
文摘The deficiency theories of dyslexia are quite contradictory and the cross-cultural studies in recent years mainly focused on whether the dyslexics among cultures shared the same cognitive profile or just based on the language.This study used Near-Infrared Spectroscopy (NIRS) imaging to measure the regional cerebral blood volume (BV) and the changes of cerebral activation in the left prefrontal cortex of 12 Chinese dyslexic children and their 12 age-matched normal controls during the Paced Vis-ual Serial Addition Test (PVSAT).Results showed that the scores of PVSAT of dyslexic children were significantly lower than those of the normal children (t=3.33,P<0.01).The activations of the left pre-frontal cortex in the normal group were significantly greater than those of dyslexic children (all P<0.01).Our results indicated that Chinese dyslexia had a general deficiency in working memory and this may be caused by the abnormal metabolic activity of brain blood volume in the left prefrontal cortex and the deficits in brain function might be the basis of neuropathology of Chinese dyslexia.Present study sup-ports the difference on brain activation of dyslexics from different languages may be caused by the same cognitive system related to reading.
文摘<strong>Background:</strong> To determine the induced refractive error among the readymade garment workers. Those who are working in the knitting section and those who are working other than the knitting and computer section. <strong>Methods:</strong> It was a prospective cross-sectional analytic study among 600 workers in 2 factories at Joydevpur, Gazipur, Bangladesh on January 2020. Group: A comprises 300 workers who were working at knitting section for a minimum of six hours a day and 5 days a week. Group: B comprises another 300 workers who were appointed for loading-unloading, care-taker, driver and security guard also. Prevalence of refractive error in two groups was compared. <strong>Results:</strong> The mean age of participants in group: A was 26.61 ± 4.99 (CI 95%, 26.04 ± 27.18) and in group: B was 28.51 ± 5.69 (95% CI 27.86 ± 29.15). Prevalence of refractive error between two groups was 52 and 28.3 respectively. The chi-square statistic is 44.9775. The p-value is <0.00001. Significant at p < 0.05. Strong positive correlation shows in Pearson’s correlation between time duration of knitting and refractive error (R is: 0.7619). Visual acuity between two groups chi-square statistic is 33.1866. The p-value is <0.00001. Significant at p < 0.05. <strong>Conclusion:</strong> Knitting workers at readymade garment (RGM) are more prone to develop late onset myopia than other workers in the same premises.
文摘研究近场通信(Near Field Communication,NFC)技术在配电架空线路带电抢修作业中的应用。通过分析NFC技术原理,结合配电线路抢修工作需求,设计基于NFC技术的智能化抢修管理系统,将NFC标签植入线路设备、杆塔、关键连接点,实现设备身份快速识别、巡检数据实时采集。应用结果表明,该技术能够提高抢修效率,降低安全风险,为配电线路智能化运维提供技术支持。
