“If you already do it, try it with prism.”


The video is a great multi-modal task from our friend Robert Constantine, the VisionRehab OT. Add a bouncing ball and some yoked prism, and this kid is going to the moon!

Robert and I engaged in a lot of discussion around the use of prism in therapy at the Vision Rehabilitation Roadshow 2020. You can, as a rule, ‘throw prism’ at just about anything so long as a) it’s ‘yoked’, b) you have some guidance, and c) it’s not for a long duration. A word of caution: If your client finds the prism ‘toxic’, leading to headaches, nausea, mental confusion, anxiety, just stop. Proceed with caution, and slowly, expect the unexpected. Tell your client to brace for a change in what they see – if they can tolerate what you put in front of them, then start working.

On what, you might ask? What should you try to do with prism? Well, as the title of this post suggests – whatever you normally do. Larger prism powers shift and distort space more as the image is smeared across from base to apex, becoming more stretched out towards the apex. A reasonable amount of yoked prism to try for gross motor and vestibular challenges is in the range of 10pd or more, but carry a variety of prism goggles to provide a different options.

Learn more about the therapeutic use of prism, and a whole lot more, by enrolling in the Vision Rehabilitation Roadshow 2020.

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