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Billiards Digest July, 2011 "Aim, Align, Sight -Part II: Visual Alignment" ILLUSTRATED PRINCIPLES
 

Summary: Billiards Digest July, 2011
"Aim, Align, Sight - Part II: Visual Alignment" ILLUSTRATED PRINCIPLES
David Alciatore, PhD ("Dr. Dave")
Supporting narrated video (NV) demonstrations, high-speed video (HSV) clips, and technical proofs (TP),
and all of my past articles, can be accessed and viewed online at billiards.colostate.edu. The reference
numbers used in my articles will help you locate the resources on the website. If you have a slow or
inconvenient Internet connection, you might want to view the resources from a CD-ROM or DVD. Details
can be found online at: dr-dave-billiards.com.
This is my second article in a series dealing with the important topics of aiming, alignment, and sighting.
Last month, we focused on aiming concepts. This month, we'll focus on visual alignment (i.e., where you
place your eyes to best visualize the line of a shot).
Where you place your eyes, and whether or not you do so consistently for a given type of shot, is
probably one of the most important elements of successful pool playing. This topic certainly doesn't get the
attention it deserves in most instructional books and videos. Diagram 1 illustrates quite graphically the
importance of eye placement relative to the cue. In all three photographs, the shot is lined up straight into the
pocket, as is clear in Diagram 1b, where the vision is centered properly. Diagrams 1a and 1c show what
happens when the eyes are not properly aligned with the cue. With your vision shifted to the left (see
Diagram 1a), the tip will appear to be slightly to the right of center-ball, and the cue will appear to point off-line
to the left. With your vision shifted to the right (see Diagram 1c), the tip will appear to be slightly to the left of
center-ball, and the cue will appear to point off-line to the right. Diagram 2 shows how the tip position can be

  

Source: Alciatore, David G. - Department of Mechanical Engineering, Colorado State University

 

Collections: Engineering