Home Forums Hunting & Shooting Competitive Shooting Lasic eye surgery?

When do you get time to work?

...some of it is incidental to my work.

chris,

i've shot with dave a few years ago and can attest to his fastidiousness. looks like this warrants further investigation - more specifically: can this be used as a spectacle lens rather than within the rear sight (a rules thing).

could be cause a person to start looking for good ammo and attempting a 'comeback' or something silly..... now you went and did it!!!

Chrisf, There has been some experiments mainly on monkey with taking out their natural lens and putting in a flexible substance. The results as I understand it have been widely variable. Some of the monkeys had a great accomodative amplitude[normal focusing near to far] others had poor accomodation. The study didnt understand or explain why some worked and others didnt.
The clear lens exchange/cataract surgery idea holds some promise for accomodation. As I posted before researchers have tried bifocal implants and implants that flex forward with cilliary body contraction... This tech. is getting very close to an acceptable leval of precision and repeatability that it will start being done more and more by cataract dr's that do a lot of it. Surgical skill is a big deal with these so dont just let Dr. try to put a bifocal/accomodating lens in your eye.
As for other reasons than a stiffer lens as the primary cause for our lack of near ability as we age I say mostly BS. Dean

Bill,
From the service rifle experience, those diffractive lenses must be oriented very square to the line of sight, thus they work in an AR, but the M1/M14 rear sight arrangement is presenting problems with the arc of the curved gear/pinion changing the plane. Not sure how that bodes for an eyeglass frame mounting. Are you considering another run at ISSF?

eyeguy, I believe the trade names of the lenses are ReStor, ReZoom, NuVue and AcrySoft. The class is called multifocal and accommodative intraocular lens implantation (IOL) or Refractive Lens Exchange (RLE). Are these practical solutions for the iron sight shooting presbyope?

Re the Schachar school of thought on presbyopia; He just recently published a paper where he examined stiffness of cadaver lenses and found not enough difference to explain the loss of accommodation. It just popped up in a pubmed search, and I pulled it, but haven't read it yet. PM me for a copy.

The restore lens is probably the most succesful lens at this time. It has sort of a hinge and moves forward when the cillary body contracts. Like moving a pair of reading glasses down your nose gives more power for reading. I am not confident that these lens would be perfect for iron shooting but would think they have a chance at giving back enough focus that the shooter would feel like it worked ok. The speed of refocus and amount of refocus seems t be somewhat variable from patient to patient.
As for the lens not being the cause for presbyopia I find it a little hard to believe its anything else since from what I understand the cillary body contracts the zonules/strings attached to the lens can go fully slack and the lens doesnt change shape enough to focus at near. If the strings are slack what else could it be but a stiff lens?