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ENGLISH ABSTRACT
JOURNAL ARTICLE
[Predictability of amblyopia in ametropic children. Apropos of 96 cases].
Journal Français D'ophtalmologie 1998 June
PURPOSE: The aim of this cross-sectional retrospective study was to analyze the predictability of amblyopia in children with myopic and hyperopic unilateral and bilateral ametropia.
MATERIALS AND METHODS: One hundred and sixty two eyes of 96 children, (mean age: 8.6 years), were included in this work. Mean visual acuities and significant refractive errors were estimated for all the cases. The frequency of amblyopia and strabismus was studied in cases without amblyopia and in cases with medium and high grade amblyopia.
RESULTS: Mean visual acuities were significantly higher in cases of bilateral myopia (p < 0.001) and hyperopia (p < 0.05) compared with unilateral ametropia. The frequency of myopic eyes (p < 0.01), eyes with high grade of myopia (p < 0.002) and anisomyopic eyes (p < 0.001) was significantly higher in cases of high amblyopia compared with cases without amblyopia. Strabismus (p < 0.05) were also significantly more frequent in cases of high amblyopia as well as in cases of myopic eyes (p < 0.01). Moreover, in the group of high amblyopia, 6 cases (6/7) had developed an intolerance for contact lenses.
CONCLUSIONS: The risk of developing high grade amblyopia appeared significantly associated with unilateral medium and high level myopia. Strabismus and difficulties with good correction of anisometropia by contact lenses or spectacle appeared to be predisposing factors. This observation would suggest the indication of refractive surgery might be useful in these particular cases. To conclude, this study emphasizes the importance of early treatment of ametropia to reduce the incidence of amblyopia in children.
MATERIALS AND METHODS: One hundred and sixty two eyes of 96 children, (mean age: 8.6 years), were included in this work. Mean visual acuities and significant refractive errors were estimated for all the cases. The frequency of amblyopia and strabismus was studied in cases without amblyopia and in cases with medium and high grade amblyopia.
RESULTS: Mean visual acuities were significantly higher in cases of bilateral myopia (p < 0.001) and hyperopia (p < 0.05) compared with unilateral ametropia. The frequency of myopic eyes (p < 0.01), eyes with high grade of myopia (p < 0.002) and anisomyopic eyes (p < 0.001) was significantly higher in cases of high amblyopia compared with cases without amblyopia. Strabismus (p < 0.05) were also significantly more frequent in cases of high amblyopia as well as in cases of myopic eyes (p < 0.01). Moreover, in the group of high amblyopia, 6 cases (6/7) had developed an intolerance for contact lenses.
CONCLUSIONS: The risk of developing high grade amblyopia appeared significantly associated with unilateral medium and high level myopia. Strabismus and difficulties with good correction of anisometropia by contact lenses or spectacle appeared to be predisposing factors. This observation would suggest the indication of refractive surgery might be useful in these particular cases. To conclude, this study emphasizes the importance of early treatment of ametropia to reduce the incidence of amblyopia in children.
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