Amblyopia, or lazy eye, is the most common cause of vision loss in children. And the condition, which compromises depth perception, can last into adulthood.

But until recently, treatments for amblyopia hadn’t changed much.

The standard approach relies on an eye patch over the stronger eye to force the brain to rely on the weaker, or lazy, eye. It works most of the time, but isn’t perfect.

Now, several research teams are taking a new tack that aims to get the brain to make better use of the information coming from both eyes. Several companies have popped up that are working on therapies based on this new angle.