Inverse dating between bed course and you will myopia

24.02.2022 от Деревянко Алексей Выкл

Inverse dating between bed course and you will myopia


This population-based, cross-sectional study using a nationwide, systemic, stratified, multistage, clustered sampling method included a total of 3625 subjects aged 12–19 years who participated in the Korean National Health and Nutrition Examination Survey 2008–2012. All participants underwent ophthalmic examination and a standardized interview including average sleep duration (hr/day), education, physical activity and economic status (annual household income). Refractive error was measured by autorefraction without cycloplegia. Myopia and high myopia were defined as ??0.50 dioptres (D) and ??6.0 D, respectively. Sleep durations were classified into 5 categories: <5, 6, 7, 8 and >9 hr.


The overall prevalence of myopia and high myopia were 77.8% and 9.4%, respectively, and the overall sleep duration was 7.1 hr/day. The refractive error increased by 0.10 D per 1 hr increase in sleep after adjusting for potential confounders including sex, age, height, education level, economic status and physical activity. The adjusted odds ratio (OR) for refractive error was 0.90 (95% confidence interval [CI], 0.83–0.97) per 1 hr increase in sleep. The adjusted OR for myopia was decreased in those with >9 hr of sleep (OR, 0.59; 95% CI, 0.38–0.93; p for trend = 0.006) than in those with <5 hr of sleep. However, high myopia was not associated with sleep duration.


This research provides the populace-depending, epidemiologic evidence for a keen inverse dating anywhere between sleep duration and you may myopia for the an agent society away from Korean adolescents.


Myopia is one of the most prominent ocular problems connected with graphic interference in the world (Morgan ainsi que al. 2012 ). New incidence off myopia try increasing from the a crisis speed, particularly in Eastern China and you will Southern area-East China, and more reduced during the America, Europe, Israel and you will Australia (Morgan & Flower 2013 ). The expenses associated with visual handicap because of myopia include correction regarding refractive error thru cups, contacts and you will refractive functions. Likewise, the latest comorbidities and you can pathological effects from the higher myopia can result within the severe death of vision as well as loss of sight (Morgan et al. 2012 ). You’ll find subsequent public can cost you regarding death of yields for the myopia. Ergo, you will find a growing significance of ways to avoid the start and advancement of myopia.

Exposure issues to own myopia was generally examined during the early in the day epidemiologic knowledge (Bowl ainsi que al. 2012 ). Close work, training, many years, financial updates and you can height was indeed apparently considered to be related having myopia (Zhang ainsi que al. 2011 ; ). Recently, an elevated number of backyard date was shown to have an excellent protective feeling up against myopia development in both get across-sectional training (Rose et al. 2008a , b ) and you can longitudinal studies (Jones et al. 2007 ; Jones-Jordan et al. 2011 ; Guggenheim ainsi que al. 2012 ). Several intervention research has reported decreases in the myopia by the expanding time external (Wu et al. 2013 ), and you can a beneficial about three-12 months college or university-depending input also has stated positive effects (Guggenheim ainsi que al. 2012 ). It was postulated you to definitely enhanced sunshine power outdoors expands dopamine launch regarding retina, and that decreases eyes increases, and therefore theory has been shown for the a number of laboratory education into the experimental myopia dogs (Gao et al. 2005 ; McCarthy et al. 2007 ; Stone mais aussi al. 2007 ; Feldkaemper & Schaeffel 2013 ).

You will find previously stated the fresh new quite high frequency out-of myopia and you will highest myopia inside the younger populations during the urban (Seoul, 96.5% and 21.6%, respectively) and you can rural (Jeju, 83.3% and you may 6.8%, respectively) portion from inside the Southern Korea ( ). Furthermore, i have advertised brand new rapid secular alterations in the incidence of myopia during the a representative Korean human population (Kim et al. 2013a ). These types of change are most likely with the extreme studies pressures to the Korean students, since Korean children are one of the highest painters in the global PISA surveys out of college or university abilities (Morgan & Flower 2013 ). Especially in their teenage ages, Korean adolescents have also stated getting insufficient sleep, particularly in new later years from senior high school (Yang ainsi que al. 2005 ; Rhie ainsi que al. 2011 ). We hence hypothesized one to insufficient sleep ined so it hypothesis having fun with representative inhabitants-based data on Korean NHANES degree.