lose sight of
US /luːz saɪt əv/
UK /luːz saɪt əv/
1.
to forget a distant object or person, or to no longer be able to see it
:
•
The ship sailed away until we lost sight of it.
•
As the plane ascended, the city lights began to fade, and soon we lost sight of the ground.
2.
to forget about an important idea or fact because you are too involved in other things
:
•
In all the excitement, we must not lose sight of our main objective.
•
It's easy to lose sight of the big picture when you're focused on small details.