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Participants had been asked during recruitment whether they were treated for amblyopia in childhood and whether they still had the condition in adulthood.

The condition, also known as amblyopia, can be treated with a patch over the "good" eye in order to help the other build its link to the brain.

The Food and Drug Administration approved a virtual reality-based treatment for children with the visual disorder amblyopia, or lazy eye, the company behind the therapy announced today.

While examining children, Marinescu found three with amblyopia, a disorder she says can “limit access to certain professions in adulthood.”

Delayed diagnosis can make treatment for sight problems such as amblyopia, known as "lazy eye", much less effective.