In article <32334331.6A057609@netjam.net>, signal@netjam.net says...

>I wear glasses, but don't like to when I shoot. I would like to buy a
>diopter eyepeice for my Canon A1 but am not sure which to get. it is my
>understanding that most cameras, including the Canon A1, already has the
>eyepeice fixed at -1 diopters. I look thru my left eye, which has the
>following info:
>
>Sphere Cylinder Axis
>-.50 -2.00 070
>
>So am i CORRECT in thinking I should just buy a -1 diopter, and thats
>what I need? This is because the camera has -1 already (like most
>cameras do), so -1+-1=-2

Hmmm, it looks like you have astigmatism (the -2 cylindrical), so
an eyepiece correction lens won't do you much good (unless you always
hold the camera one way....;-). I solved the problem of glasses,
barely-focusing eyes, bi-focals, etc. by having my non camera focus
eye corrected for infinity, my camera focus eye corrected for the
camera VF distance, the non camera focus eye bifocal set for a
closer distance, and the camera focus eye bifocal set for an
even closer distance (bifocals are 25mm flat-tops, set low in large
lenses to maintain good distance wide-angle vision), giving me
four distances for sharp focus, one of which is optimised for my
cameras. This has worked well (and glasses are no problem with Nikon
HP finders). It looks like you need very little focus correction,
mostly astigmatism correction (and could probably see the VF screen
better with no distance correction, just astigmatism correction).
Hope This Helps