Working with my phorias (eye gaze and muscle imbalance) I require lot of pairs of glasses. This is because my phorias move around a lot. I can test myself with the maddox rod test to find out where my phorias are and then choose the glasses to treat that phoria. Sometimes the glasses are on point and sometimes they are not quite on point but they will do. Sometimes I am surprised by which glasses help me. They don’t seem to quite match the test results. Sometimes one eye partially suppresses to allow my other eye to take up the reigns for a while. This could be better than the experience of both eyes fighting.
What I learnt is that my lenses are just bits of plastic with prism in that can help me. I play around with them like someone trying on shoes or hats. I enjoy them – my trial prism lenses are very precious to me! Some I have from a set of trial lenses and some I just popped out of a pair of cheap glasses that I bought with just prism in. So far it has been impossible to buy 0.25 diopter prism trial lenses so I had to do the popping out thing for these. I also sometimes combine glasses – wear one pair and fold the arm back on another to use the lens as an extra one. I work with any resources I can find to learn about my eyes and establish a relationship with them and my experience of the changing light.
Working with prisms is not an exact science. My husband who is no-where near me on the scale of sensitivity was trying out some prisms to find the up and down rotation. He found that for prism diopter 3 – 5 he was actually experiencing the prism upside down. The image was moving in the direction he didn’t expect. We didn’t have any answers for that. That was a mystery. In the same way prisms are doing mysterious things for me every day. I don’t fully understand how my brain relates to prism but it definitely likes it!
Prisms lenses – just bits of plastic that might help you!
Focus Your Eyes, Focus Your Brain 