title: Myopia and night lighting in children in Singapore.
abstract: OBJECTIVE
  To examine the role of night time lighting and myopia in children in Singapore
  
  
  METHODS
  A cross sectional study was conducted on 1001 children in two Singapore schools. Cycloplegic refraction and A-scan biometry measurements were made in both eyes. A detailed questionnaire was completed by the parents to obtain information on night time lighting, near work activity, educational and demographic factors.
  
  
  RESULTS
  There was no difference in myopia prevalence rates in children exposed to night time light (33.1%) compared with children who slept in the dark (31.4%) before age 2. In addition, vitreous chamber depth was not related to night light (p = 0.58) before age 2. These results remained even after controlling for near work.
  
  
  CONCLUSIONS
  Myopia is not associated with night light in Asian populations.
authors.affiliation: Department of Community, Occupational and Family Medicine, National University of Singapore, Republic of Singapore. cofsawsm@nus.edu.sg
authors.forename: S M
authors.initials: SM
authors.lastname: Saw
authors.forename: H M
authors.initials: HM
authors.lastname: Wu
authors.forename: C Y
authors.initials: CY
authors.lastname: Hong
authors.forename: W H
authors.initials: WH
authors.lastname: Chua
authors.forename: K S
authors.initials: KS
authors.lastname: Chia
authors.forename: D
authors.initials: D
authors.lastname: Tan
mesh_terms: D000867:Anterior Chamber; D002648:Child; D002675:Child, Preschool; D002940:Circadian Rhythm; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008029:Lighting / Q000009:adverse effects*; D016015:Logistic Models; D008297:Male; D009216:Myopia / Q000453:epidemiology / Q000209:etiology*; D015995:Prevalence; D011932:Reading; D012029:Refraction, Ocular / Q000502:physiology; D018709:Statistics, Nonparametric; D014822:Vitreous Body