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https://www.aao.org/basic-skills/amblyopia-patching-faqs#:~:text=There%20is%20good%20evidence%20that%202%20hours%20of,for%206%20hours%20per%20day%20is%20usually%20recommended.
https://pubmed.ncbi.nlm.nih.gov/16751033/
After a period of treatment with spectacles, 2 hours of daily patching combined with 1 hour of near visual activities modestly improves moderate to severe amblyopia in children 3 to 7 years old. A randomized trial to evaluate 2 hours of daily patching for strabismic and anisometropic amblyopia in children
https://www.aao.org/basic-skills/amblyopia-patching-faqs
There is good evidence that 2 hours of patching a day is as effective as 6 hours of patching for moderate cases of amblyopia (vision between 20/40 – 20/80 or 6/12-6/24). In more severe amblyopia patching for 6 hours per day is usually recommended.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5396957/
When patching is prescribed, it is reasonable to prescribe 2 hours of daily patching for moderate amblyopia and 6 hours of daily patching for severe amblyopia. Some children with severe amblyopia will respond to as little as 2 hours of patching.
https://pubmed.ncbi.nlm.nih.gov/25695355/
Time course and predictors of amblyopia improvement with 2 hours of daily patching JAMA Ophthalmol . 2015 May;133(5):606-9. doi: 10.1001/jamaophthalmol.2015.6.
https://jamanetwork.com/journals/jamaophthalmology/fullarticle/2119069
Taken together with results from prior studies, we conclude that it is reasonable to initiate patching at a dosage of 2 hours each day, even for children with severe amblyopia. 5 If there is no improvement between 2 visits, reasonable options include increasing the prescribed patching dose to 6 hours per day 4 or continuing 2 hours of prescribed patching, knowing that …
https://www.optometrystudents.com/patch-not-patch/
When the VA in the amblyopia eye stops improving with 2 hours of patching, increase the hours of patching to 6 hours for children aged 3 to 7. For children aged 7-12, prescribing patching can improve VA even if amblyopia has been previously treated. For older children aged 13-17, prescribing patching can improve VA when amblyopia has NOT been …
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8589941/
One may assume that the longer hours of patching result in more vision improvement. Paradoxically, for moderate amblyopia, a prescribed patching dose of 2 h/day resulted in the same amount of visual acuity improvement as a prescribed patching dose of 6 h/day and, for severe amblyopia, 6 h/day yielded similar results to 12 h/day . However, these ...
https://www.aao.org/disease-review/pedig-studies-quality-healthcare-amblyopia-treatme
PEDIG studies showed that moderate amblyopia (20/40-20/100) responds equally well to 2 hours/day patching of the sound eye compared with 6 hours/day and full-time patching in young children 3-7 years old. 1 Clinicians can now decrease their recommended patching time to 2 hours/day for moderate amblyopia and counsel parents that 62% of patients achieve either …
https://da4e1j5r7gw87.cloudfront.net/wp-content/uploads/sites/478/2015/10/AmblyopiaOutline.pdf
*Part-Time patching (>2 hours/day) with min. 1 hour/day of near visual activities • Age does not prevent success of treatment (Wick et al. Optom Vis Sci 1992; 69:866-78) It is never too late to treat amblyopia!
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