This is known as intermittent divergent squint.
It is fairly common condition. Sometimes due to refractive error eyes gets tendency to move out when fatigued or person not alert.
It is best treated by getting power of glass changed and convergence exercises.
Convergence exercises are simple pen exercises in which person gazes a tip of pen at arms length and bring it closes , till its tips get doubled and then moving it far till it becomes single.
Answered2021-07-24 06:02:38
Let others know if this answer was helpful