We classify a bath screen as a movable panel. that is that is is hinged and will swing into or out of the shower area. The bath screen can full height for a walk-in shower or it can be up on a tub deck for a shower/tub screen. A bath screen is ideal for the ADA curb-less shower. Fold out of the way for access to the shower area, and fold it back for water protection. Double bath screens can provide up to 69 inches of access opening to the shower area.
A Shower Partition is basically one or more fixed panels of glass positioned to form a shower alcove. These very popular in Europe. They visually make the bathroom area appear larger. They don't provide as much water protection as a full shower door. There are no standard widths for bath screens or partitions. If you have a sunflower rain style shower head you will have less of a water problem.