I had cataract surgery a couple years back, fixed-focus far distance lenses in both eyes. And my cataracts were kinda like sepia-colored sunglasses, so another benefit was that the world became not only brighter, but rendered in prettier colors! With fixed-distance lenses I still need progressive-lens glasses, which is fine as I was used to 'em. It was odd to go from having been near-sighted my whole life to suddenly being far-sighted though!
An iris with an adjustable opening is of great benefit, especially for older eyes; the OEM eye disks on match diopters tend to have tiny openings around 1mm, that are of marginal use outside a well-lit target range. Pre-surgery an iris was a necessity for me, too - I saw a black spot floating in the middle the aperture until I opened it up past 2mm.
An interesting halfway house between peep and scope is an iris with a 1.5x magnifying lens; those have a big enough range of focus that even before cataract surgery, I could shoot fine without my glasses. Here's a Williams with an old Gehmann magnifying iris fitted via an adapter.
An iris with an adjustable opening is of great benefit, especially for older eyes; the OEM eye disks on match diopters tend to have tiny openings around 1mm, that are of marginal use outside a well-lit target range. Pre-surgery an iris was a necessity for me, too - I saw a black spot floating in the middle the aperture until I opened it up past 2mm.
An interesting halfway house between peep and scope is an iris with a 1.5x magnifying lens; those have a big enough range of focus that even before cataract surgery, I could shoot fine without my glasses. Here's a Williams with an old Gehmann magnifying iris fitted via an adapter.
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