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Trial of Myopia Prevention Using +3D Lenses (PLS)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified February 2009 by Sun Yat-sen University.
Recruitment status was:  Not yet recruiting
Australian National University
Information provided by:
Sun Yat-sen University Identifier:
First received: February 20, 2008
Last updated: February 20, 2009
Last verified: February 2009

February 20, 2008
February 20, 2009
April 2010
April 2012   (final data collection date for primary outcome measure)
Axial Length of eyes [ Time Frame: Annual ] [ Designated as safety issue: No ]
Same as current
Complete list of historical versions of study NCT00627874 on Archive Site
Autorefraction [ Time Frame: Annual ] [ Designated as safety issue: No ]
Same as current
Not Provided
Not Provided
Trial of Myopia Prevention Using +3D Lenses
A Randomised, Controlled Trial of Prevention of Juvenile-Onset Myopia in Chinese Children
The purpose of this study is to assess whether a short-term imposed myopic defocus is effective in preventing the development and progression of juvenile-onset myopia in Chinese children.
  1. To determine if +3D lenses wearing for half an hour everyday prevents the development and progression of myopia in school children.
  2. To identify ocular parameters and risk factors at baseline associated with development and progression of myopia.
Not Provided
Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Prevention
Device: +3D Lenses
wear +3D glasses for 30 minutes per day and engage in activities which require vision at more than 1m
  • Experimental: 1
    wear +3D glasses for 30 minutes per day and engage in activities which require vision at more than 1m
    Intervention: Device: +3D Lenses
  • No Intervention: 2
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Unknown status
April 2012
April 2012   (final data collection date for primary outcome measure)

Inclusion Criteria:

  • All children in the selected class are enrolled

Exclusion Criteria:

  • Hyperopia > +2.0 D
  • High myopia > -6.0 D
  • Astigmatism> 1.5 D
  • Anisometropia > 1.5 D
  • Strabismus and amblyopia
  • Any ocular, systemic, or neurodevelopmental conditions that could influence refractive development
  • Chronic medication use that might affect myopia progression or visual acuity
  • Already receiving other treatment for progressing myopia
Child, Adult, Senior
Contact information is only displayed when the study is recruiting subjects
Not Provided
Not Provided
Not Provided
Not Provided
Mingguang He, Zhongshan Ophthalmic Center, ZOC
Sun Yat-sen University
Australian National University
Study Director: Mingguang He, PhD, MD Zhongshan Ophthalmic Center, Sun Yet-san University
Sun Yat-sen University
February 2009

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP