Would I be able to invert my vision by mounting a particular lens in front of each eye?
I am currently able to achieve this by mounting a right-angled triangular prism across both eyes. The specific rotation can be thought of as follows:
The effect is that things in the "bottom" of my visual field appear at the "top" and "upsidedown". For example, if I stand and move my head to look down, I see my legs apparently "in front of me" and my feet pointing "towards me".
The prism arrangement is heavy, uncomfortable (there is an edge with an acute angle against my forehead), and severely restricts my view (which can be fully occluded by an A3 sheet of cardboard held at arms length). This is a problem as the scientific value of this arrangement comes from being able to wear them for extended periods (e.g. a whole day, or 4 hours a day for a month).
Is there a lens that would have essentially the same inversion effect, without all of the problems in the previous sentence? Suggested solutions don't have to be inexpensive.
Best Answer
Binoculars include a prism that invert the image as the lenses already do an inversion. The lens apparatus would be a bit heavy to use as an inversion mechanism, but the prisms (Porro prims for instance) could do the job. They can provide a decent field of view. Even if they take some space and weight, I doubt any other apparatus, such as a lens arrangement, could do better.