I have a combination "Shooting Optometry" Rifle / Fixture that I built, years ago.
Basically a good ( Winchester Marksman) target rifle stock fitted with an adjustable for length "Barrel".
The Rear sight is an enormous "Hadley" style cup (built here) that's got a LOT of aperture sizes.
The "Barrel" is removed from the stock (one big captive knob, a salvaged handstop adjustment piece)....barrel / (now in fixture mode) is muonted so's to allow optometrists big "Viewer" to apply, OR he can hold the lenses manually.
Your "Shooter's Optometrist" has blown a regular eye chart down to the proportions at which it's corect for YOUR chosen sight radius, and with you reading the chart through the largest aperture you think you'll ever use. You're not just looking at Is and Os,...your reading the ENTIRE CHART.
Once your presription is chosen, the "barrel" goes back in the stock, and you set the almost infinately adjustable rear aperture sight to conform to YOUR rifles geometry, and try the whole process from that angle.
If you're seeing and reading to everybody's satisfaction, theres one more CRITICAL step,.....With a good straight length of TIG welding wire run through your regular rifle's front and rear apertures, and the rear of that wire daubed with a little blob of paint, one assumes a good "Hold",....the optometrist plinks the rod into your regular glasses, and the mark left on the lens will be the OPTICAL CENTER of your new prescription lenses. Promotes COMFORTABLE shooting.
Sounds complicated, ....AIN'T.
Anyone wants to broach the subject of running this eye test with their Optom., the rig's available as a loaner. If the optometrist doesn't have the wherewithal and knowledge needed to blow the chart down for your sight radius, I would look for someone who CAN, and understands the principles involved.
I'll get some pictures of that goofy lookin' thing, later today, and post em' this evening.
Greg
