Inverse matchmaking ranging from bed stage and myopia

Inverse matchmaking ranging from bed stage and 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 study has the populace-centered, epidemiologic proof to possess a keen inverse dating anywhere between sleep stage and you can myopia within the a representative people of Korean kids.


Myopia the most popular ocular infection regarding visual interference worldwide (Morgan et al. 2012 ). Brand new prevalence out of myopia is growing at the an epidemic rates, particularly in Eastern Asia and Southern-East China, and more sluggish inside North america, Europe, Israel and you may Australia (Morgan & Rose 2013 ). The expense associated with artwork impairment on account of myopia become modification of refractive error via glasses, contacts and refractive operations. Simultaneously, the fresh new comorbidities and you can pathological effects with the large myopia might result from inside the serious loss of attention and also loss of sight (Morgan mais aussi al. 2012 ). There are next public can cost you with regards to death of production in the myopia. For this reason, there can be an increasing dependence on techniques to avoid the beginning and you may advancement of myopia.

Chance factors to own myopia was in fact generally investigated into the early in the day epidemiologic degree (Bowl mais aussi al. 2012 ). Close works, studies, decades, financial condition and you will height have been seem to said to be associated with myopia (Zhang et al. 2011 ; ). Recently, an elevated level of outside big date is actually proven to have an effective protective feeling against myopia development in each other cross-sectional studies (Rose ainsi que al. 2008a , b ) and you can longitudinal studies (Jones ainsi que al. 2007 ; Jones-Jordan ainsi que al. 2011 ; Guggenheim ainsi que al. 2012 ). A few intervention studies have said reductions into the myopia from the broadening date external (Wu et al. 2013 ), and you may an excellent around three-season university-founded input even offers claimed positive effects (Guggenheim et al. 2012 ). It absolutely was postulated you to improved sunshine strength outside develops dopamine discharge from the retina, which decrease vision growth, and this hypothesis has been shown inside a series of laboratory knowledge toward experimental myopia pets (Gao mais aussi al. 2005 ; McCarthy mais aussi al. 2007 ; Brick et al. 2007 ; Feldkaemper & Schaeffel 2013 ).

I’ve prior to now claimed the newest quite high incidence out of myopia and highest myopia inside the young populations during the urban (Seoul, 96.5% and you may 21.6%, respectively) and you will outlying (Jeju, 83.3% and you may six.8%, respectively) section within the Southern Korea ( ). Moreover, i’ve said this new fast secular changes in the fresh new prevalence of myopia in the a representative Korean adult population (Kim et al. 2013a ). This type of change are probably of the serious data challenges with the Korean youngsters, just like the Korean youngsters are among high performers little armeniaprofiel zoeken throughout the worldwide PISA studies regarding school show (Morgan & Rose 2013 ). Particularly in the adolescent years, Korean teens are also said having sleep disorder, especially in new later years from senior school (Yang et al. 2005 ; Rhie ainsi que al. 2011 ). We ergo hypothesized one to sleep disorders ined this hypothesis having fun with associate inhabitants-centered research regarding Korean NHANES education.