When my granddaughter, age 11, blinks, one eye pops open as normal. But the other eye opens only very slowly. It almost looks like she is trying to wink, but she is not, it is involuntary. What is it?
She needs to be seen by an ophthalmologist to evaluate. One thing that can cause this is called Marcus Gun Jaw Winking Syndrome You can Google that and read about. It can also be an eyelid problem called "ptosis"