Newborn darting eyes

So I gave birth to twins a little over 2 weeks ago. They were born at 37 weeks. One of them ( my son) hasn’t seemed to start focusing much with his eyes. They suddenly dart in the other direction when he tries to focus. Or sometimes they role. I’ve not seen this before as I do have a toddler and he was also born at 37 weeks but I did not experience this with him. His twin sister’s are focusing fine. Has anyone experienced this with their babies?? Concerned is something more serious.

I did run this by the pediatrician and he said we will keep an eye on it for the next 6 months but I’m like that’s a bit long to wait...