lose sight of

US /luːz saɪt əv/
UK /luːz saɪt əv/
"lose sight of" picture
1.

perder de vista, dejar de ver

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.
El barco zarpó hasta que lo perdimos de vista.
As the plane ascended, the city lights began to fade, and soon we lost sight of the ground.
A medida que el avión ascendía, las luces de la ciudad comenzaron a desvanecerse, y pronto perdimos de vista el suelo.
2.

perder de vista, olvidar

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.
En toda la emoción, no debemos perder de vista nuestro objetivo principal.
It's easy to lose sight of the big picture when you're focused on small details.
Es fácil perder de vista el panorama general cuando te concentras en pequeños detalles.