The guide currently writes:
As you hunt for Visions, if you pick up Visions that are not for your profession, do not fret. Loot the vision and see the Exchange Officer of IPS to swap it for one for your profession.
However, as I discovered when preparing to hand in my T1 materials:
- the Exchange Officer only accepts exactly three visions of the same type at a time, and crucially ...
- on giving him three versions, he will only give you one of your profession's vision in return.
This was frustrating to discover so close to handing in my T1 materials, and I felt misled by the guide here. Especially as I'd left my profession's visions to decay on corpses, thinking that if I had 18 of them already, I wouldn't need any more.
I'd suggest making these points clearer in the guide; namely, the 3:1 exchange ratio, and that you need
exactly three of the same vision type to make the exchange.