you should seek a squint
specialist, who will do a clinical examination to evaluate diplopia(double vision
are you a diabetic or hypertensive- diabetic are more prone to muscle paresis which leads to diplopia.
do you see any deviation of the black portion of the eye while looking straight?
is there any asymmetry of the position of the black portion on looking at extremes on either side?
you can ask somebody to observe
it appears that one eye is having lateral rectus paresis
- it the muscle which helps us seeing the extreme sides.
will help in finding the cause.
usually these are treatable with good recovery so do not worry