The title says it all, how do the more "mature" members that are reading this, cope with iron sights? I am 56 and planning my first African Safari for next year, the goal is a Buffalo up close, I have a Vaughan .470 DR purchased specfically for the task, I want to use the iron sights on this rifle and for this job I prefer them to all other sighting systems, but I have a problem:

I am short sighted and wear glasses, with them my long range vision is excellent, but in recent years I have had to use bifocals so I can read, now I have problem, when I lay my head on a rifle stock the rear sight is extremely blurred!

My wife used to work in an optromist office, she just told me that they made up a "reversed" pair of bifocals for a mechanic. Any one out there used these for shooting?

With a telescopic sight I can hold my own with anyone, but with iron sights it is another story. For example if I have to lay down and shoot a handgun from under a car I can not get the rear sight in focus due to my head angle and my accuracy goes to hell. I have found myself adopting a head high stance when shooting a handgun, this is OK I guess but when a Buffalo gets close and I swing a DR instinctively my head will be tucked on the stock and the rear sight blurred!

Looking for advice please. For the younger readers, pay close attention, for this will surely happen to you one day!