The multiple pinhole 'glasses'
have been in use for about thirty-five years.
Slightly different versions have appeared on the
market at various and sometimes excessive prices.
The more expensive ones are generally better made
and finished but there is no clear evidence as to
whether the optical qualities are any different.
Various claims have been made for their
efficiency both as a visual aid, and as a means
of improving unaided eyesight. Manufacturers
often refer to the Bates Method in their
promotional material and some have taken to
supplying Dr Bates' book together with their
product.
The general consensus among Bates teachers is
that these devices are useful but that the claims
sometimes made for them as a complete solution to
visual problems, or as a replacement for, or
improvement on, the Bates Method are exaggerated
and misguided. The remainder of this article
describes how they work and makes some
suggestions for their use.
Multiple Pinhole Glasses
