Pilot Study to Assess the Efficacy of Short Exposure to Defocus to Slow the Progression of Myopia in Children
The objective of this pilot study is to establish whether brief periods of high levels of acutely imposed myopic defocus can be used to slow the progression of myopia in children, as measured by changes in spherical equivalent refraction and axial length.
|Study Design:||Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Single Blind (Investigator)
Primary Purpose: Treatment
|Official Title:||Pilot Study to Assess the Efficacy of Short Exposure to Defocus to Slow the Progression of Myopia in Children|
- Myopia progression as measured by spherical equivalent, and axial length [ Time Frame: 12 month ] [ Designated as safety issue: Yes ]
|Study Start Date:||November 2006|
|Study Completion Date:||October 2008|
|Primary Completion Date:||October 2008 (Final data collection date for primary outcome measure)|
Recent results on animal models of myopia suggest that the eye has the ability to detect the overall sign of defocus of images falling on the retina, with myopic defocus imposed by the fitting of plus-lenses halting or slowing axial elongation of the eye. In the animal models, these STOP growth signals have been shown to be particularly strong - with brief periods of high myopic defocus able to outweigh the effects of prolonged periods of imposed hyperopic defocus in promoting eye growth. These results therefore suggest a novel strategy for preventing the progression of myopia in children - the imposition of high levels of myopia for brief periods of time. This approach is conceptually distinct from under-correction, which imposes chronic mild myopic defocus.
|Singapore, Singapore, 168751|
|Principal Investigator:||Audrey Chia, FRANZCO||Singapore National Eye Center|