Differences in regional naming and screen types are causing confusion in nearby comments.
A screen door can be a secondary exterior rigid door with metal mesh panels[1], or a hanging fabric mesh door[2]. A window screen can be a metal mesh, in a rigid metal frame, tightly integrated with a window[3], or a flexible add-on[4].
The polyester/fiberglass/etc fabric meshes can be more opaque than the metal ones.
