Doc, how does that prism work?

I have been talking a lot about prism and how we can use it to align the eyes.  It dawned on me that a lay person may not understand how this actually works! A prism will move an image.  It really boils down to that basic concept.  If you hold a prism in front of one eye the image from that eye will move in certain direction and amount that can be measured.

Let take this one step further.  If one eye's image is too high and one is too low, they land on different points on the retina. The human brain does not like this and try to compensate to correct this problem causing the symptoms of vertical heterophoria. Using very precise amounts of prism we can move those images onto corresponding points on the retina.  When this is accomplished the symptoms of vertical heterophoria dramatically improve.

How will the prism glasses look? The glasses look to the outside world like normal regular glasses in a normal regular frame, but they are actually a visual orthotic device.  The glasses become your medicine.  No drugs,  just glasses.