TargetTalk

A technical question about my shooting glasses' prescription: In my shooting glasses I reduce my distance vision prescription from -1.50 to -1.00. Should I also reduce the prescription for my astigmatism from -.075? I haven't done this in the past and I don't know what I would reduce it to. Mike Barron [/b]

Mike,

the correction for your astigmatism should be different to the distance correction. The change from -1.5 to -1 is to bring your focus onto the foresight. The astigmatism is a different thing; it stayed the same for me between my shooting prescription and my general prescription.

What Tim said.

The first number, the Sphere, moves your focal point in/out, and adding the +0.5 moved your eye's relaxed focal point from infinity in to 2 meters, which is the hyperfocal distance for a rifle.

The second and third number are the Cylinder and Axis values which correct for the astigmatic error in your eye. These values stay the same, no matter what distance you focus.

Thanks Art. I'd hoped that you would see the post. Mike Barron