With the passage of time, the human eye undergoes transformations that prevent it from focusing correctly, at the same time, the point of aim of the pistol and the target. The lens of the human eye loses elasticity over the years and cannot adjust well, at the same time, two planes as distant as the point of aim of the pistol (very close to the shooter) and the target that is located at 25 meters away from us. For this we use: 1º- Corrective lenses that allow us to see correctly the point of view of the gun and 2º - The diaphragm mounted on the glasses, which allows, by opening and closing the passage of the light beam to our eye, to focus better or worse, the target located in the distance, that is, the corrective lenses solve the problem of correctly seeing the aiming point of the gun and the diaphragm solves the focus of the target in the distance, making it acquire enough sharpness to be able to do the aim. Without the diaphragm it is difficult for us to see the target correctly, we see it blurry.

The screen for the non-acting eye is an ideal complement that provides comfort and ease in correctly performing the aiming phase of the weapon. Without the screen for the eye that does not act, we have to keep one eye closed in a forced and annoying position that causes fatigue and discomfort after a few minutes of practicing the shot. With the screen lowered, the shooting posture is natural and our eyes are rested. The screen can be raised to carry out the loading maneuvers of the weapons.

These help systems for our sight are valid for both firearms and pneumatic weapons.