Limiting visibility also means limiting lighting.
Blinds up or down for privacy.
The convex side faces the window creating less space through which to view.
By turning the blinds up you limit the amount of visibility space directed towards the room.
If the window is higher than street level then tilting the blinds up will give you more privacy.
The view and the light will be toward the direction of the ceiling.
When the blinds are turned up the rounded side faces outward.
It depends on where the window is in relation to the view from outside.
By turning the blinds up you have the option of a little bit more control for a darker room if desired.
The direction up or down to close blind slats is a matter of personal preference but if you want more privacy tilt them up with the rounded side facing out.
When the blinds are tilted down they could look pretty aesthetically but they provide less privacy as it creates larger gaps between the slats.
When the blinds are lowered from the top small cords can be seen holding it in place which can slightly obstruct your view.
For the best light coverage add hanging pleats at the top of your window.
If the window is lower than the street level then tilting the blinds down will give you more privacy.
With the blinds tilted up passers by can t see in.
With the rounded side facing in and the blinds turned down it s easier for prying eyes to see in the room at night especially when it s lit from the inside.
The most popular top down bottom up shade style is the honeycomb cellular which offers the best light control and privacy.
However having the rounded side facing out may not be as aesthetically pleasing as when the rounded side of the slats faces in.
People won t be able to see inside when passing by.