I tried the both the upper normal vision and the lower reading part of my bifoculs at the air gun shoot yesterday, indoors shooting a pistol. It it hadn't had green lighted dots in the rear sight, and a reddish orange one on the front sights, I would not have been able to discern the rear sights, except for the reading part. With that one, both sights were sharp and clear, but the target, only 50' (16.6yards) away was so blurry, it was hardly distinguishable from the donna conno covers over the rack of steel plates in the backstop. I'll try the .25, .50 and .75 diopter "readers" I have to see if they help. I'm assuming the reading part of my glasses is likely closer to 1.5 or 2.0 diopters, thus there is too much distortion of the target. With the normal distance vision lens of my glasses, the black metal parts of my handgun sights had no definite edges - all FUZZZZZZZ, as were the green and red?/orange? Maybe had to mount a red-dot sight on it? Anyone try one of those on a muzzle loader?