Hello again, and thanks for your reply with additional information and for your patience.
I'm glad to hear her eyes are not swollen or red at all, but her squinting may be due to an irritant she was exposed to in her environment (spray air freshener, hairspray, etc.) and it's causing some discomfort in her eyes. As far as the eyes being crossed, she may have a weak muscle issue, and this would have to be investigated further through an in-person exam by the vet, or veterinary ophthalmology specialist.
I'm glad you got her a 'friend' and they're getting along well, but if you just noticed this symptom with her eyes, today, it's possible that she got scratched or injured in/near her eyes while they were playing.
For the moment, continue to monitor her behavior, eating, eliminating, etc., and bring her in for an evaluation by the vet, ASAP, to get a diagnosis on her eyes and then, treatment, if needed.
I hope all will be well with your furry girl!