How do people use Venetian blinds in a traditional VDU task office

We are developing a model that is able to predict the most adapted venetian blinds position (slat angle) for a VDU office worker, considering visual comfort matters. This algorithm, which takes into account room parameters as well as visual comfort criterions, is being validated by an in-situ measurement campaign. During 8 months, two field studies are lead to understand the way that office-workers actually use their blinds.