An epidemiological study of the risk factors associated with myopia in young adult men in Korea

Lee, Dong Cheol; Lee, Se Youp; Kim, Yu Cheol

doi:10.1038/s41598-017-18926-2

Cited by 30 publications

(18 citation statements)

References 39 publications

(53 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other studies have linked development of myopia in East Asia to improvements in nutrition leading to increased body height and axial length of the eye. 31,49 The typical body height of the Swedish population changed from 179.3 cm in 1950s to 180.4 cm in 1980s (0.6% change) whilst in China, it changed from 169.3 cm to 171.5 cm (1.3% change) in the same period. 50 The authors speculate that this can also be a contributing factor for a relatively stable prevalence of myopia in Scandinavia.…”

Section: Discussionmentioning

confidence: 99%

“…Weight and height were used to compute the body-mass-index (BMI) in kg/m 2 , BMI has been associated with development of myopia. 31 Parents or legal guardians completed a questionnaire given as supplemental material. The questionnaire collects, amongst other, demographic information, history of myopia in the family, ethnicity, amount of time spent in activities such as near work or activities outdoor.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Refractive error, axial length, environmental and hereditary factors associated with myopia in Swedish children

Demir

Baskaran

Theagarayan

et al. 2021

Clinical and Experimental Optometry

View full text Add to dashboard Cite

Clinical relevance: Investigation of refractive errors amongst Swedish schoolchildren will help identify risk factors associated with myopia development. Background: Genetic and hereditary aspects have been linked with the development of myopia. Nevertheless, in the case of 'school myopia' some authors suggest that environmental factors may affect gene expression, causing school myopia to soar. Additional understanding about which environmental factors play a relevant role can be gained by studying refractive errors in countries like Sweden, where prevalence of myopia is expected to be low. Methods: Swedish schoolchildren aged 8-16 years were invited to participate. Participants underwent an eye examination, including cycloplegic refraction and axial length (AL) measurements. Predictors such as time spent in near work, outdoor activities and parental myopia were obtained using a questionnaire. Myopia was defined as spherical equivalent refraction (SER) ≤ −0.50D and hyperopia as SER ≥ +0.75D. Results: A total of 128 children (70 females and 58 males) participated in this study with mean age of 12.0 years (SD = 2.4). Based on cycloplegic SER of the right eye, the distribution of refractive errors was: hyperopia 48.0% (CI95 = 38.8-56.7), emmetropia 42.0% (CI95 = 33.5-51.2) and myopia 10.0%. (CI95 = 4.4-14.9). The mean AL was 23.1 mm (SD = 0.86), there was a correlation between SER and AL, r = −0.65 (p < 0.001). Participants with two myopic parents had higher myopia and increased axial length than those with one or no myopic parents. The mean time spent in near work, outside of school, was 5.3 hours-per-day (SD = 3.1), and mean outdoor time reported was 2.6 hours-per-day (SD = 2.2) for all the participants. The time spent in near work and outdoor time were different for different refractive error categories. Conclusion: The prevalence of myopia amongst Swedish schoolchildren is low. Hereditary and environmental factors are associated with refractive error categories. Further studies with this sample are warranted to investigate how refractive errors and environmental factors interact over time.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Refractive error, axial length, environmental and hereditary factors associated with myopia in Swedish children

Demir

Baskaran

Theagarayan

et al. 2021

Clinical and Experimental Optometry

View full text Add to dashboard Cite

show abstract

“…Although TFNT00 has been studied in western populations, it has not been evaluated in the Korean population. Recently, the prevalence of myopia in Korea has increased [ 22 ], and ophthalmic evaluation surveys from 2008 to 2014 showed that 71% of Korean subjects aged < 50 years and 65% of children had myopia [ 23 , 24 ]. In some regions, the prevalence of myopia has been reported to be > 80% [ 25 ], which may result from increased time spent performing near-distance work [ 23 ].…”

Section: Discussionmentioning

confidence: 99%

Visual outcomes and safety after bilateral implantation of a trifocal presbyopia correcting intraocular lens in a Korean population: a prospective single-arm study

et al. 2020

View full text Add to dashboard Cite

Background To investigate the 3-month postoperative performance and safety after implantation of a trifocal intraocular lens (IOL) in a Korean population. Methods This was a clinical, prospective, multicenter, single-arm study. Forty-four subjects (88 eyes) with bilateral cataract with expected postoperative corneal astigmatism of < 1.00 diopter (D) and no ocular disease or eye condition underwent bilateral implantation of the AcrySof IQ® PanOptix IOL (TFNT00). Postoperative examination at 3 months included binocular defocus curve; binocular best corrected distance visual acuity (BCDVA); monocular/binocular uncorrected VA (UCVA) at distance (4 m), intermediate (60 cm), and near (40 cm); contrast sensitivity under photopic conditions with/without glare; and subjective outcomes, including satisfaction and spectacle independence. Results Binocular defocus curve at 3 months after bilateral implantation showed VA of 0.1 logMAR or better from + 0.5 D through − 2.5 D. Binocular BCDVA mean ± SD at 4 m was − 0.05 ± 0.07 logMAR. Binocular and monocular UCVA was 0.03 ± 0.1 and 0.08 ± 0.12 logMAR (4 m), − 0.00 ± 0.11 and 0.05 ± 0.13 logMAR (60 cm), and 0.03 ± 0.12 and 0.09 ± 0.13 logMAR (40 cm), respectively. Contrast sensitivity with glare was 1.67 ± 0.13, 1.91 ± 0.17, 1.54 ± 0.21, and 1.14 ± 0.20 log units at 3, 6, 12, and 18 cycles/degree, respectively. At near and intermediate distances, 84 and 77% of subjects reported good/excellent satisfaction, and 84 and 91% of subjects reported spectacle independence, respectively. Conclusions In a Korean population, visual performance of the trifocal TFNT00 IOL 3 months postoperatively was < 0.1 logMAR for binocular UCVA at all distances, with high subject satisfaction and spectacle independence. Trial registration www.ClinicalTrials.gov ( NCT03268746 ). Registered August 31, 2017.

show abstract

“…At the enlistment, military volunteers have to pass a 9-week basic combat training program and maintain their physical fitness by mandatory daily exercises as deploying to the assigned military schools or troops. To our knowledge, both obesity and underweight have been identified as risk factors of myopia in young adult men in Asia (Lee, Lee, & Kim, 2018; Lim et al, 2018). Given the preclusion of severe obesity and underweight at enlistments, regular rigorous training could result in a similar profile of body stature between the myopic and nonmyopic military volunteers (Napradit & Hatthachote, 2016).…”

Section: Discussionmentioning

confidence: 99%

Quantitative Physical Fitness Measures Inversely Associated With Myopia Severity in Military Males: The CHIEF Study

Liu

Hsieh

et al. 2019

Am J Mens Health

View full text Add to dashboard Cite

Myopia has been linked to body weight and sedentary status, but the association with quantitatively measured physical fitness in adults has not been examined. Cross-sectional analyses were performed to investigate the association between physical fitness and myopia in 3,669 military men (aged 29.4 years) in Taiwan. The severity of myopia obtained from the left eye was classified as mild (−0.5 to −3.0 diopters; n = 544), moderate −3.1 to −6.0 diopters; n = 563), and high (<−6.0 diopters; n =150); others were defined as nonmyopia ( n = 2,412). Aerobic fitness was evaluated by time for a 3000-meter run test, and muscular endurance was evaluated by numbers of 2-min sit-ups and 2-min push-ups. A value of p < .0125 was considered significant. A multiple linear regression analysis was used to determine the relationship. Individuals who were less physically fit had higher risk of myopia. The associations were dose-dependently significant with mild, moderate, and high myopia for 3000-meter running time (β = 9.64; 95% confidence intervals [3.22, 16.05], β = 12.41; 95% CI [6.05, 18.76], and β = 20.87; 95% CI [9.22, 32.51], respectively) after controlling for the potential covariates. There tended to be an inverse association with moderate and high myopia for numbers of 2-min push-ups (β = −1.38; 95% CI [−2.43, −0.34] and β = −2.10; 95% CI [− 3.97, −0.22], respectively) and 2-min sit-ups (β = −0.83; 95% CI [−1.54, −0.12] and β = −1.29; 95% CI [−2.56, −0.02], respectively), respectively. This study suggested that physical fitness, particularly aerobic fitness of the military males who received regular training, is inversely associated with myopia severity, independent of service specialty, body mass index, and educational level.

show abstract

An epidemiological study of the risk factors associated with myopia in young adult men in Korea

Cited by 30 publications

References 39 publications

Refractive error, axial length, environmental and hereditary factors associated with myopia in Swedish children

Refractive error, axial length, environmental and hereditary factors associated with myopia in Swedish children

Visual outcomes and safety after bilateral implantation of a trifocal presbyopia correcting intraocular lens in a Korean population: a prospective single-arm study

Quantitative Physical Fitness Measures Inversely Associated With Myopia Severity in Military Males: The CHIEF Study

Contact Info

Product

Resources

About