I've always been told that your eyes get 'used' to a pair of
magnifiying glases and cannot easily return to their original
sight. That's why people continually have to get stronger glasses.
Makes sense. I find this true.
According to the opthamologists and other doctors I consulted when
writing the safety book magnification is not a problem, and does not
alter the eyes.
There are issues with a lower level of blinking when using
magnificaton that results in dry eyes and thus pain and irritation,
but the ones I consulted said that if you are hurting your eyes they
will let you know. And having said that I do know a photographer
whose eyes apparently altered because of looking through the lens
with one eye only. best Charles
Charles Lewton-Brain/Brain Press
Box 1624, Ste M, Calgary, Alberta, T2P 2L7, Canada
Tel: 403-263-3955 Fax: 403-283-9053 Email: @Charles_Lewton-Brai1