I think that giving your eyes time to focus on what you are looking at is the most important part of aiming. Sometimes when I get down on the shot, I get blurry and double vision of my shaft and the cueball. It makes it very difficult to see what I'm aiming at.
I realized that what causes that to happen, is looking back and forth too quickly between the cueball and the object ball. When you look at something close to you, your eyes need a second or two in order to give you a clear picture. Same thing if you shift your vision from something near you, to an object farther from you. If your eyes dart back and forth too quickly, you aren't getting a clear image (very similar to a camera lens). IMO that's equivalent to someone with bad eyes shooting pool without glasses or contac lenses.
I would like to add that whether you look at the cueball or object ball last, it's very important that you watch the balls make contact with each other.
I realized that what causes that to happen, is looking back and forth too quickly between the cueball and the object ball. When you look at something close to you, your eyes need a second or two in order to give you a clear picture. Same thing if you shift your vision from something near you, to an object farther from you. If your eyes dart back and forth too quickly, you aren't getting a clear image (very similar to a camera lens). IMO that's equivalent to someone with bad eyes shooting pool without glasses or contac lenses.
I would like to add that whether you look at the cueball or object ball last, it's very important that you watch the balls make contact with each other.