Hi all! Since I passed the downhill side to the century mark my eyes have gotten to the point that I cannot focus very well. With my glasses I can focus on the target but the sights are just a black blur. I can look over the rim of my glasses and focus on the sights very well but the target is then a blur. I'm afraid in a defensive situation I wouldn't be very accurate. Are there any aftermarket sights available for a 1911 Gov't Model that will help my situation?