P3D Is it Healthy

[Rod Sage <rsage@xxxxxxxxxxxxxxxxxxxx>]

Dr. T replies
>Not many people are qualified to give a medical advice... and
>neither am I, but, what the heck?  My understanding is that
>changing the convergence of the eyes is a good exercise that
>strengthens the eye muscles.  So, I'd say, yes, it's healthy.
>Do it!

I have a Keystone Eye Training stereoscope with cards. The booklet which
came with it explains that "as we exercise our bodies we should also
exercise our eyes". The cards are difficult to look at as they have very
wide and very narrow separation of the images and cause your eyes to
strain. They suggest that you exercise your eyes regularly but don't
over-do it.

RDS