hi again whitelabel,
I suggest you to have another Nagel Anomaloscope test in Switzerland or Germany,or somewhere else which is not the place where that idiot made you fail it!!
I know for sure both the turning knobs must be used, and this seems to be pretty obvios now.
The machine you showed me looks pretty the same that I've used here!
but i didn't get the 1e 2e and 3e circles matter.
The Anomaloscope I was tested on showed only one circle, and i had to make the semicircles it was divided into look as much similar as possible, if not alike!
the result in my test was closer to a rather
darkened red and green. That's all about this I suppose.
anyway, I've heard there are 2 or 3 types of anomaloscope, so we may have used different ones!but I'm sure that you failed it because of that assistant who really didn't know how to make that test.
I'm sorry for what happened to you...but you know...., things are
never easy with medicals!!
Keep me posted anyway, ciao!!