Assessment of Bifocal and Prismatic Bifocal Spectacles for Myopia Control in Children
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|ClinicalTrials.gov Identifier: NCT00787579|
Recruitment Status : Completed
First Posted : November 7, 2008
Last Update Posted : November 7, 2008
- To determine if the effect of near-addition lenses (bifocals) is more prominent for children with high myopia progression.
- To study how different subject characteristics such as age, gender, baseline degree of myopia, baseline near phoria and baseline lag of accommodation affect the efficacy of bifocal lens wear in myopic children.
- To investigate the effect of incorporating near base-in prisms along with the near-addition lenses (prismatic bifocals) on myopia progression in myopic children.
|Condition or disease||Intervention/treatment||Phase|
|Myopia||Device: Bifocal spectacles Device: Prismatic bifocal spectacles||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||135 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||None (Open Label)|
|Official Title:||Assessment of Bifocal and Prismatic Bifocal Spectacles for Myopia Control in Children|
|Study Start Date :||April 2003|
|Actual Primary Completion Date :||April 2008|
|Active Comparator: Bifocal spectacles||
Device: Bifocal spectacles
+1.50D bifocal spectacles
|Active Comparator: Prismatic bifocals||
Device: Prismatic bifocal spectacles
+1.50D bifocal spectacles combined with 3Δ base-in prisms
|No Intervention: Single vision spectacles|
- Myopia progression, measured by cycloplegic autorefraction [ Time Frame: Every 6 months ]
- Axial length, measured by A-scan ultrasonography [ Time Frame: Every 6 months ]
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00787579
|Dr. Desmond Cheng & Associates|
|Mississauga, Ontario, Canada, L5N 7G5|
|Principal Investigator:||Desmond Cheng, OD, MSc||Queensland University of Technology|