move together. The brain doesn’t like that, which will cause her to suppress her bad eye. As the optic pathway develops (like tree roots stretching back into the brain), they will give preference to the better eye, leading to inadequate maturation of the bad eye. Thus, if not corrected early in life, she will never see as well in the bad eye.

I don’t recall the specifics of when/how the correction should take place (prism/patch if ___, surgery if ___, etc.) , but I can look it up later and get back to you.

**EDIT/UPDATE: Here is a link to the EyeWiki website that discusses cranial nerve 4 palsies. Ultimately, because treatment is based on symptoms and a physical exam, you need to see a pediatric ophthalmologist soon for complete eval. Definitely not something to set aside and wait on.