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Near Work Related Parameters and Myopia in Chinese Children: the Anyang Childhood Eye Study.

Li SM, Li SY, Kang MT, Zhou Y, Liu LR, Li H, Wang YP, Zhan SY, Gopinath B, Mitchell P, Wang N, Anyang Childhood Eye Study Gro - PLoS ONE (2015)

Bottom Line: Questions were asked regarding time spent in near work and outdoors per day, and near work related parameters.Television viewing distance (≤ 3 m), fluorescent desk light, close reading distance (≤20 cm) and close nib-to-fingertip distance (≤ 2 cm) were significantly associated with longer axial length (P<0.01).Continuous reading, close distances of reading, television viewing and nib-to-fingertip, head tilt when writing, reading more books for pleasure and use of fluorescent desk light were significantly associated with myopia in 12-year-old Chinese children, which indicates that visual behaviors and environments may be important factors mediating the effects of near work on myopia.

View Article: PubMed Central - PubMed

Affiliation: Beijing Tongren Eye Center, Beijing Tongren Hospital, Beijing Ophthalmology Visual Science Key Lab, Beijing Institute of Ophthalmology, Capital Medical University, Beijing, China.

ABSTRACT

Purpose: To examine the associations of near work related parameters with spherical equivalent refraction and axial length in Chinese children.

Methods: A total of 1770 grade 7 students with mean age of 12.7 years were examined with cycloplegic autorefraction and axial length. Questions were asked regarding time spent in near work and outdoors per day, and near work related parameters.

Results: Multivariate models revealed the following associations with greater odds of myopia: continuous reading (> 45min), odds ratio [OR], 1.4; 95% confidence interval [CI], 1.1-1.8; close television viewing distance (≤ 3m), OR, 1.7; 95% CI, 1.2-2.3; head tilt when writing, OR, 1.3; 95% CI, 1.1-1.7, and desk lighting using fluorescent vs. incandescent lamp, OR, 1.5; 95% CI, 1.2-2.0. These factors, together with close reading distance and close nib-to-fingertip distance were significantly associated with greater myopia (P<0.01). Among near work activities, only reading more books for pleasure was significantly associated with greater myopia (P=0.03). Television viewing distance (≤ 3 m), fluorescent desk light, close reading distance (≤20 cm) and close nib-to-fingertip distance (≤ 2 cm) were significantly associated with longer axial length (P<0.01). Reading distance, desk light, and reading books for pleasure had significant interaction effects with parental myopia.

Conclusions: Continuous reading, close distances of reading, television viewing and nib-to-fingertip, head tilt when writing, reading more books for pleasure and use of fluorescent desk light were significantly associated with myopia in 12-year-old Chinese children, which indicates that visual behaviors and environments may be important factors mediating the effects of near work on myopia.

No MeSH data available.


Related in: MedlinePlus

Age-gender-height adjusted axial lengths (2A, mm, mean±SEM, P = 0.04) and spherical equivalent (2B, D, mean±SEM, P = 0.05) by reading books for pleasure per week and parental myopia using general linear model.
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pone.0134514.g002: Age-gender-height adjusted axial lengths (2A, mm, mean±SEM, P = 0.04) and spherical equivalent (2B, D, mean±SEM, P = 0.05) by reading books for pleasure per week and parental myopia using general linear model.

Mentions: The interaction effect from parental myopia and a history of reading more books for pleasure was statistically significant for longer axial length values (P = 0.04) and of borderline significance for SE (P = 0.05) (Fig 2A and 2B). Children with two myopic parents and who read books for more than 0.79 hours/day (highest category) had 1.1 mm longer axial length and 2.7D greater myopia than children with no myopic parent and who read books less than 0.42 hours/day (lowest category).


Near Work Related Parameters and Myopia in Chinese Children: the Anyang Childhood Eye Study.

Li SM, Li SY, Kang MT, Zhou Y, Liu LR, Li H, Wang YP, Zhan SY, Gopinath B, Mitchell P, Wang N, Anyang Childhood Eye Study Gro - PLoS ONE (2015)

Age-gender-height adjusted axial lengths (2A, mm, mean±SEM, P = 0.04) and spherical equivalent (2B, D, mean±SEM, P = 0.05) by reading books for pleasure per week and parental myopia using general linear model.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4526691&req=5

pone.0134514.g002: Age-gender-height adjusted axial lengths (2A, mm, mean±SEM, P = 0.04) and spherical equivalent (2B, D, mean±SEM, P = 0.05) by reading books for pleasure per week and parental myopia using general linear model.
Mentions: The interaction effect from parental myopia and a history of reading more books for pleasure was statistically significant for longer axial length values (P = 0.04) and of borderline significance for SE (P = 0.05) (Fig 2A and 2B). Children with two myopic parents and who read books for more than 0.79 hours/day (highest category) had 1.1 mm longer axial length and 2.7D greater myopia than children with no myopic parent and who read books less than 0.42 hours/day (lowest category).

Bottom Line: Questions were asked regarding time spent in near work and outdoors per day, and near work related parameters.Television viewing distance (≤ 3 m), fluorescent desk light, close reading distance (≤20 cm) and close nib-to-fingertip distance (≤ 2 cm) were significantly associated with longer axial length (P<0.01).Continuous reading, close distances of reading, television viewing and nib-to-fingertip, head tilt when writing, reading more books for pleasure and use of fluorescent desk light were significantly associated with myopia in 12-year-old Chinese children, which indicates that visual behaviors and environments may be important factors mediating the effects of near work on myopia.

View Article: PubMed Central - PubMed

Affiliation: Beijing Tongren Eye Center, Beijing Tongren Hospital, Beijing Ophthalmology Visual Science Key Lab, Beijing Institute of Ophthalmology, Capital Medical University, Beijing, China.

ABSTRACT

Purpose: To examine the associations of near work related parameters with spherical equivalent refraction and axial length in Chinese children.

Methods: A total of 1770 grade 7 students with mean age of 12.7 years were examined with cycloplegic autorefraction and axial length. Questions were asked regarding time spent in near work and outdoors per day, and near work related parameters.

Results: Multivariate models revealed the following associations with greater odds of myopia: continuous reading (> 45min), odds ratio [OR], 1.4; 95% confidence interval [CI], 1.1-1.8; close television viewing distance (≤ 3m), OR, 1.7; 95% CI, 1.2-2.3; head tilt when writing, OR, 1.3; 95% CI, 1.1-1.7, and desk lighting using fluorescent vs. incandescent lamp, OR, 1.5; 95% CI, 1.2-2.0. These factors, together with close reading distance and close nib-to-fingertip distance were significantly associated with greater myopia (P<0.01). Among near work activities, only reading more books for pleasure was significantly associated with greater myopia (P=0.03). Television viewing distance (≤ 3 m), fluorescent desk light, close reading distance (≤20 cm) and close nib-to-fingertip distance (≤ 2 cm) were significantly associated with longer axial length (P<0.01). Reading distance, desk light, and reading books for pleasure had significant interaction effects with parental myopia.

Conclusions: Continuous reading, close distances of reading, television viewing and nib-to-fingertip, head tilt when writing, reading more books for pleasure and use of fluorescent desk light were significantly associated with myopia in 12-year-old Chinese children, which indicates that visual behaviors and environments may be important factors mediating the effects of near work on myopia.

No MeSH data available.


Related in: MedlinePlus