R.Y.
One of mine did that a bit when he was a very small baby and then outgrew it. It took more than 5-6 weeks but less than 6 months. If you haven't noticed an improvement by around 3 months then make the follow up appointment. If a crossed or "lazy' eye is left uncorrected it causes problems eventually but as long as you follow up in the first year it is probably good. I knew a child who did not have a lazy eye corrected until he was in his teens and he had very little depth perception.