Light control is a vital factor in commercial buildings. Beyond the visual comfort of the building tenants, there are issues of cooling costs, heating costs, UV damage and the temperature comfort of the tenants.
The good news is that 1" or 5/8" mini-blinds are available from Allied Window in a system that incorporates them into our interior storm window installation. These "between-glass" blinds can be tilted using a remote control knob, while the blinds are protected from dirt and damage. They are accessible by simply removing the storm window panel. See Magnetic One Lite with Mini-Blind