Pistol shooting glasses

[RobinC]

To clarify,

For RIFLE with aperture sights, the lens you need is a +0.5 dioptre added to your long vision prescription and including your astigmatism, regard less of your prescription this is fixed and is the addition for all. So for example you have a +1.5 prescription, then for rifle you need +1.5 + 0.5 = +2.00 If you have a negative, then -1.5 +0.5 = 1.00

That compensates for the three focal distances involved and that you are looking through a small aperture. That 0.5 compensation will give you a bias to the front sight element (correct rifle aim!) and a compromise picture to the rear sight, and the aiming mark.

For PISTOL, its slightly different, in that you basically have two focal distances, the sights and the aiming mark. The bias should be on the sights, and the aiming mark can be very fuzzy indeed. To achieve that you will need a lens that achieves sharp focus on the sights, and it will likely be for most people your long vision prescription including astigmatism, plus + 0.75 dioptre. Where the rifle addition is fixed, there may be slight variations for pistol, but we are talking 0.1 dioptre variations and this is dependent on your arm and pistol length, and there can be advantages in getting checked with the pistol on aim, but even then its generally +0.75, and is a figure added to your long prescription so +1.5 + 0.75 =2.25 with minus's -1.5 +0.75 = -0.75.

A very fuzzy aiming mark is no issue, the concentration should be on the sharp sight picture.

Have Fun
Robin