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Assessment of Bifocal and Prismatic Bifocal Spectacles for Myopia Control in Children

Not Applicable
Completed
Conditions
Myopia
Registration Number
NCT00787579
Lead Sponsor
Essilor International
Brief Summary

1. To determine if the effect of near-addition lenses (bifocals) is more prominent for children with high myopia progression.

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

Not available

Recruitment & Eligibility

Status
COMPLETED
Sex
All
Target Recruitment
135
Inclusion Criteria
  • Age: 8 to 13 years
  • 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
  • Strabismus
  • Ocular diseases

Study & Design

Study Type
INTERVENTIONAL
Study Design
PARALLEL
Primary Outcome Measures
NameTimeMethod
Myopia progression, measured by cycloplegic autorefractionEvery 6 months
Secondary Outcome Measures
NameTimeMethod
Axial length, measured by A-scan ultrasonographyEvery 6 months

Trial Locations

Locations (1)

Dr. Desmond Cheng & Associates

🇨🇦

Mississauga, Ontario, Canada

Dr. Desmond Cheng & Associates
🇨🇦Mississauga, Ontario, Canada

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