Several years ago an eye doctor who enjoyed shooting...
wrote an article on barrel length and vision. He believed that those people who were near sighted (needed correction for distance) shot better with shorter barrels while far sighted people generally shot better with longer barrels.
I don't know if this holds true for all or even most people, but it is correct in my case. I wear glasses to correct my distance vision (also to read now, but that came with the gray hair) and have always done my best shooting with 4" or less barrels on revolvers. I shoot quite well with snub nose revolvers and always have. This was really brought home to me after purchasing a 15-2VH Dan Wesson Pistol Pac w/2 1/2, 4, 6 & 8 inch barrels. The basic handgun was extremely accurate. I had a friend who got excellent accuracy with the 8" tube. Me? Did my best shooting with the snub barrel and the 4".