Ray,
Thanks. I appreciate the clarification.
If you do not have not eyesight problems, I agree the risk is absolutely minimal. But as some of us age, it can be problematic. In my case, I already have some symptoms of retinal detachment even without shooting. I have to be careful because after shooting heavy recoiling guns (light 12 ga slug guns actually seem to be the worst) for a while, I either see flashes or things go black at the instant of recoil. This is a warning sign.
