Before revision: If the eye relief of a telescopic sight is too short, leaving the eye close to the sight, the firearm's recoil can force the optic to strike the skin around the shooter's eye, leaving a cut .
After revision: If the eye relief of a telescopic sight is too short, leaving the eye close to the sight, the firearm's recoil can force the eyepiece of the optic to hit and cut into the skin around the shooter's eye, leaving a curved scarring laceration on the medial end of the eyebrow .