Have you ever had an easy cut shot that you shot a little hard without english and missed the pocket by a couple inches or more. You probably attributed the miss to your stroke, eye alignment or a myriad of other things.
The chances are though your aim and stroke were dead on. The probable reason for your miss was object ball deflection*. Huh? You say you're an advanced player and know all about cue ball deflection which occurs when you strike the cue ball hard enough using english but how can the object ball deflect without any english being applied? The answer is that the same principle applies to both object ball and cue ball deflection.
Below the 15 ball is shot into the corner with soft to medium speed. The line of aim from the cue ball to the object ball is dead on to the point of contact made by a line running from the center of the pocket through the center of the object ball. In this case there is little or no object ball deflection.

Diagram 1
· Long Straight In Shot
· Shooting Hard with English
· How to Stroke
· Abstract Aiming System
· Combination Shots made easy
· Jack up and Rail Shots
· Razor Thin Cut Shots
· The Art of Concentration
· Tips on Safety Play
· Shaft Dent Removal
· The Bump Shot