No, they are just nocturnal by nature. They just prefer to be awake at night because they like to hunt at night. Their prey is awake at night so this means it is ideal for them to be awake so they can catch them and gobble them up. (mmm Yummy mouse)
Owls can see in daytime. Because they are nocturnal, they do not become active at the day.
No,Owls still can see during day time.