For most children, brief periods (1-2 hours/day) of keeping one eye closed for practice would not typically trigger strabismus or amblyopia.

“the part of your story that's atypical is that for most kids um an hour or two let alone minutes an hour or two even an hour or two a day if you were I don't know if you were a young kid and you just really were training up on throwing darts and you were just keeping one eye closed to throw the darts you know really practicing for an hour or day it'd be very unusual for that to trigger this kind of either stabismus misalignment of the eyes let alone amblyopia”