🚀 go-pugleaf

April and Dick,
Yoked prisms are one of the modalities we in vision rehabilitation use
for therapeutic and compensatory training. In optics, we usually use
prisms so that they work against each other (e.g. the prism over the
left eye shifts the image up, and the prism over the right eye shifts
the image down). Yoked prisms shift the image in the same direction for
both eyes (up,down, left, right). This forces the brain to recalibrate
the image coming in and sets up a opportunity for the injured brain to
relearn some visual input.
Sometimes yoked prisms are used on a continuing basis to shift a persons
visual world due to injury. If there is a visual field loss to the
right, we can shift the remaining vision over so that it is more
centered for the individual.
Yoked prisms are but one of the many techniques and training aids that
vision rehabilitation optometrists use to help those with TBI or ABI.
If you would like to know more, I would invite you to visit my web site
(see below) and explore the section on brain injury. If you still have
questions or would like a referral to a Neuro-Optometrist near you,
please write.
Cheers,
Chris

--
Christopher I. Clark, OD
Neuro-Optometric Vision Rehabilitation
Seattle, WA (206)363-8998 Voice / Fax
http://www.wolfenet.com/~cclark