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

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00627874
Recruitment Status : Unknown
Verified February 2009 by Sun Yat-sen University.
Recruitment status was:  Not yet recruiting
First Posted : March 4, 2008
Last Update Posted : February 24, 2009
Australian National University
Information provided by:
Sun Yat-sen University

February 20, 2008
March 4, 2008
February 24, 2009
April 2010
April 2012   (Final data collection date for primary outcome measure)
Axial Length of eyes [ Time Frame: Annual ]
Same as current
Complete list of historical versions of study NCT00627874 on Archive Site
Autorefraction [ Time Frame: Annual ]
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 Applicable
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (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
Same as current
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
Sexes Eligible for Study: All
Child, Adult, Older Adult
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 Yat-sen 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