This is Fhotoace’s territory, but here goes.
The image depends on its graphical distribution of the light and dark as a primary element. These have a nice visual balance and the lines have a certain amount of fluid dynamics with the hair complimenting the facial shape.
The shot is typical high-key with most probably a soft box fairly close to the lens axis to the left of the camera and somewhat above Anna’s eye level, but not all that much. This is where the flattening comes from and it also is the lighting that will show the least amount of wrinkles because there is no real modeling. You can barely see the catch lights of the lighting in the eyes, but you can see a small, soft shadow just under the nose and also to the right. This shadow also points to this lighting arrangement.
The camera also seems to be located a little above the eye level, but it’s hard to tell.
The background is definitely blown out, probably lit by two lights coming from either side at 45 degrees or something.
The glasses are a prop to the image and act to pull the image together. There may or may not be any glass in the frames, or a polarizer was used, because of the lack of reflection in the lenses. With lighting as close to on axis as this, you would expect to have them.
Is the image over exposed? Not in terms of this type of photography. This is an example of the correct exposure being determined by the desired quality of the image and not any realistic representation or relationship of tonality. In spite of the nearly complete lack midtones and the amount of max white and black, the image is not really high contrast. The lighting ratio is very low and there is actually a full tonal range, its just that there is very little of the mids.
All-in-all, a well posed and executed image by someone who knew exactly what they were doing.
Again, I’ll bow to anything Fhotoace on this, since, like I said, this is his territory.
Vance