Aren’t the glasses she wore following the concussion a “Fresnel prism” lens ? As far as I know, those are designed to treat double vision in the aftermath of a brain injury.
It must be terribly frustrating not having your eyes in sync but she just powers through it.
Yes, they are used to treat double vision, but:
“Fresnel eyeglass lenses are also helpful when treating the following ailments:
• Strabismus or lazy eye
• Phorias meaning the eye has a tendency to turn in one direction or another
• Tropias meaning the eye has already turned in one direction or another.”
http://www.doctorsvisioncenter.com/hillary-fresnel-lens/