Effect of progressive addition lenses on myopia progression in Japanese children: a prospective, randomized, double-masked, crossover trial.
Invest Ophthalmol Vis Sci
; 49(7): 2781-9, 2008 Jul.
Article
em En
| MEDLINE
| ID: mdl-18579755
ABSTRACT
PURPOSE:
This prospective, randomized, double-masked, crossover trial was conducted to evaluate the clinical effectiveness of progressive addition lenses (PALs) compared with single-vision lenses (SVLs) on myopia progression in Japanese children.METHODS:
Ninety-two children fulfilling the inclusion criteria (age 6-12 years, spherical equivalent refractive errors -1.25 to -6.00 D) were randomly allocated to either 18 months of wearing PALs (near addition +1.50 D) followed by 18 months of SVLs (group 1), or 18 months of wearing SVLs followed by 18 months of wearing PALs (group 2), and were followed up for 3 years (two-stage crossover design). The primary outcome measure was myopia progression, as determined by cycloplegic autorefraction.RESULTS:
Eighty-six (93%) children completed both treatment periods. A mixed-model, two-way analysis of variance (ANOVA) performed using 3-year data identified a significant treatment effect of PALs compared with SVLs (P = 0.0007), with a mean 18-month difference of 0.17 D (95% CI 0.07-0.26 D). This analysis also indicated a significant period effect (P = 0.0040) and a significant treatment-by-period interaction (P = 0.0223) Group 1 showed a slower myopia progression than did group 2.CONCLUSIONS:
The use of PALs slowed myopia progression, although the treatment effect was small, as previously reported in ethnically diverse children in the United States. The significant treatment-by-period interaction suggests that early application of PALs would probably be more beneficial for these age and refraction ranges (isrctn.org number, 28611140).
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Povo Asiático
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Óculos
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Miopia
Tipo de estudo:
Clinical_trials
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Prognostic_studies
Limite:
Child
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Female
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Humans
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Male
Idioma:
En
Revista:
Invest Ophthalmol Vis Sci
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Japão