Assessment of Bifocal and Prismatic Bifocal Spectacles for Myopia Control in Children
NCT ID: NCT00787579
Last Updated: 2008-11-07
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
NA
135 participants
INTERVENTIONAL
2003-04-30
Brief Summary
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2. 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.
3. To investigate the effect of incorporating near base-in prisms along with the near-addition lenses (prismatic bifocals) on myopia progression in myopic children.
Detailed Description
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Conditions
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Keywords
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
NONE
Study Groups
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Bifocal spectacles
Bifocal spectacles
+1.50D bifocal spectacles
Prismatic bifocals
Prismatic bifocal spectacles
+1.50D bifocal spectacles combined with 3Δ base-in prisms
Single vision spectacles
No interventions assigned to this group
Interventions
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Bifocal spectacles
+1.50D bifocal spectacles
Prismatic bifocal spectacles
+1.50D bifocal spectacles combined with 3Δ base-in prisms
Eligibility Criteria
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Inclusion Criteria
* Myopia: -1.00 to -5.00 D
* Myopia progression: at least 0.50 D/yr
* Astigmatism and anisometropia: not more than 1.50 D
* Distance monocular visual acuity: 6/6 or better
* Near monocular visual acuity: 0.4 M or better
* Stereoacuity: not more than 40 sec of arc at 40 cm
Exclusion Criteria
* Ocular diseases
8 Years
13 Years
ALL
Yes
Sponsors
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Queensland University of Technology
OTHER
Essilor International
INDUSTRY
Responsible Party
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Essilor International
Principal Investigators
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Desmond Cheng, OD, MSc
Role: PRINCIPAL_INVESTIGATOR
Queensland University of Technology
Locations
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Dr. Desmond Cheng & Associates
Mississauga, Ontario, Canada
Countries
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References
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Lawrenson JG, Shah R, Huntjens B, Downie LE, Virgili G, Dhakal R, Verkicharla PK, Li D, Mavi S, Kernohan A, Li T, Walline JJ. Interventions for myopia control in children: a living systematic review and network meta-analysis. Cochrane Database Syst Rev. 2023 Feb 16;2(2):CD014758. doi: 10.1002/14651858.CD014758.pub2.
Cheng D, Woo GC, Drobe B, Schmid KL. Effect of bifocal and prismatic bifocal spectacles on myopia progression in children: three-year results of a randomized clinical trial. JAMA Ophthalmol. 2014 Mar;132(3):258-64. doi: 10.1001/jamaophthalmol.2013.7623.
Cheng D, Schmid KL, Woo GC, Drobe B. Randomized trial of effect of bifocal and prismatic bifocal spectacles on myopic progression: two-year results. Arch Ophthalmol. 2010 Jan;128(1):12-9. doi: 10.1001/archophthalmol.2009.332.
Other Identifiers
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Essilor
Identifier Type: -
Identifier Source: org_study_id