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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
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.

Condition Intervention
Myopia Device: +3D Lenses

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: A Randomised, Controlled Trial of Prevention of Juvenile-Onset Myopia in Chinese Children

Further study details as provided by Sun Yat-sen University:

Primary Outcome Measures:
  • Axial Length of eyes [ Time Frame: Annual ]

Secondary Outcome Measures:
  • Autorefraction [ Time Frame: Annual ]

Estimated Enrollment: 1200
Study Start Date: April 2010
Estimated Study Completion Date: April 2012
Estimated Primary Completion Date: April 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1
wear +3D glasses for 30 minutes per day and engage in activities which require vision at more than 1m
Device: +3D Lenses
wear +3D glasses for 30 minutes per day and engage in activities which require vision at more than 1m
No Intervention: 2

Detailed Description:
  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.

Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

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
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00627874

Sponsors and Collaborators
Sun Yat-sen University
Australian National University
Study Director: Mingguang He, PhD, MD Zhongshan Ophthalmic Center, Sun Yet-sen University
  More Information

Responsible Party: Mingguang He, Zhongshan Ophthalmic Center, ZOC Identifier: NCT00627874     History of Changes
Other Study ID Numbers: PLS2008
Study First Received: February 20, 2008
Last Updated: February 20, 2009

Additional relevant MeSH terms:
Refractive Errors
Eye Diseases processed this record on September 20, 2017