Ambient Light Levels in the Kindergarten and Schools and the Relation to Refractive Development
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Myopia
- Sponsor
- Hillel Yaffe Medical Center
- Enrollment
- 200
- Primary Endpoint
- the relation between the level of myopia and light intensity
- Last Updated
- 9 years ago
Overview
Brief Summary
Myopia, the most common human eye disorder, is a phenomenon characterized by an unconstrained elongation of the eye globe There are number of theories concerning the environmental effect on the emmetropization process, most are related to childhood exposure to outdoor activity, near work and sleep with night light. Studies in lab animals found an association between intensity of ambient lighting and myopia development.
In this study, the investigators will examine the ambient light in kindergarten and schools and their relation to refractive error. Diurnal luminance in kindergarten and school class room will be measured and correlated to biometric measures such as refraction, axial length and keratometry.
Investigators
Eligibility Criteria
Inclusion Criteria
- Not provided
Exclusion Criteria
- Not provided
Outcomes
Primary Outcomes
the relation between the level of myopia and light intensity
Time Frame: change from baseline at the start point of the study, after 6 months and after 12 months
an analysis of the correlation between the two variables. the data will be collected as reported in the secondary outcome measures (number 2 and 5).
Secondary Outcomes
- levels of ambient light intensity(natural light- start of study and once a month until completion, average of 1 year. artificial light- once at the start point of the study)
- measurement of axial length(change from baseline at the start point of the study, after 6 months and after 12 months)
- measurement of Visual acuity(change from baseline at the start point of the study, after 6 months and after 12 months.)
- measurement of refraction(change from baseline at the start point of the study, after 6 months and after 12 months.)
- measurement of cornea curvature(change from baseline at the start point of the study, after 6 months and after 12 months.)