alexa The course of moderate amblyopia treated with patching in children: experience of the amblyopia treatment study.


Optometry: Open Access

Author(s): Pediatric Eye Disease Inves, Pediatric Eye Disease Inves

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Abstract PURPOSE: To assess the course of the response to patching treatment of moderate amblyopia and to assess factors predictive of the response in children 3 years old to younger than 7 years old. DESIGN: Multicenter, randomized clinical trial comparing patching and atropine (one of the amblyopia treatment studies). METHODS: A total of 209 children 3 years old to younger than 7 years of age with amblyopia in the range of 20/40 to 20/100 from the patching treatment arm of this trial were treated with patching of the sound eye from 6 hours per day up to all waking hours. Follow-up examinations were performed at 5 weeks, 16 weeks, and 6 months. The primary outcome measure was visual acuity in the amblyopic eye at 6 months. RESULTS: After 5 weeks of treatment, mean amblyopic eye acuity improved from baseline by 2.2 lines. For patients with baseline acuity of 20/80 or 20/100, a greater number of hours of prescribed patching was associated with greater improvement in the first 5 weeks (P =.05). However, this relationship was not present when baseline acuity was 20/40 to 20/60 (P =.57). At 6 months, visual acuity was improved from baseline by a mean of 3.1 lines, with the amount of improvement no longer related to the number of hours patching prescribed at baseline (P =.93). Among the 157 patients improving at least 3 lines from baseline, 15\% achieved their maximum improvement by 5 weeks and 52\% by 16 weeks. None of the demographic or clinical factors assessed was predictive of the response to treatment. CONCLUSIONS: In the treatment of moderate amblyopia, a beneficial effect of patching is present throughout the age range of 3 years old to younger than 7 years old and the acuity range of 20/40 to 20/100. At 6 months, the amount of improvement appears to be similar when 6 hours of daily patching are initially prescribed vs a greater number of hours. However, when the baseline acuity is 20/80 to 20/100, a greater number of hours of prescribed patching may improve acuity faster.
This article was published in Am J Ophthalmol and referenced in Optometry: Open Access

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