For shooters whose eyes won't focus

[Buster95]

I don't have good eye near and far what do you think of this "gadget" http://www.lymanproducts.com/lyman/sights/hawkeye.php

 

[jackenape]

Have you tried the simple fix of placing some opaque tape on the non dominant eye glasses lense?

 

[yyyyy]

Or just translucent scotch tape.... Less vision loss, but helps eyes to focus.

 

[Grizzlypeg]

Its an old and accepted idea and may offer you some assistance. A peephole over the shooting glasses increase your depth of field at the expense of lowering light levels. Same principal as in photography and setting the lens to small aperture.