Less Eye Patch Time OK for Lazy Eye
Study: No Need for Kids With Amblyopia to Wear Eye Patch for More Than 6 Hours Per Day
Sept. 13, 2007 -- There may be no extra benefit for kids with lazy eye
(amblyopia) to wear an eye patch for more than six hours daily, a new study
The study included 80 young children (average age: nearly 6) in London who
had lazy eye.
The kids were assigned to wear an eye patch for six hours per day or 12
hours per day. The point of the study was to see which eye patch "dose"
was more effective.
The researchers, who included Merrick Moseley, BSc, PhD, of Canada's McGill
University, wanted to see which eye patch "dose" was more
The longer dose is often recommended. But many kids don't like wearing eye
patches, so Moseley's team tested a shorter dose.
It turns out that both doses were equally effective -- and that most kids in
both groups didn't wear their eye patches for the recommended amount of time
The eye patches used in the study had sensors that tracked how long the kids
wore the eye patches. That gave the researchers hard data on whether the eye
patches were actually being worn or languishing somewhere in the kids'
The kids got eye tests every two weeks after they started wearing the eye
Only 23% of kids in the six-hour group and 7% of those in the 12-hour
group came close to wearing their eye patches for the assigned amount of
So despite the study's ground rules, the kids effectively got the same
"dose" from their eye patch treatment.
That may explain why both groups had the same amount of success with the eye
patches, in terms of correcting their lazy eye. That may be a reality check
about the practicality of asking little kids to wear eye patches for most of
their waking hours.
The researchers recommend that children with lazy eye be asked to wear an
eye patch for six hours per day.
The kids will likely wear their eye patch for an average of four hours per
day, and their lazy eye will probably get stronger anyway, according to the
study, published in BMJ Online First.