1) Removal from the centre 
The displacement horizontally and/or vertically of the optical centre of a spectacle lens - away from the boxed centre - to coincide with the centre of the patient`s pupil.
Removal from the centre. ... (05 Mar 2000) ... 
Type: Term Pronunciation: dē′sen-trā′shŭn Definitions: 1. Removal from the center.
The ability to focus simultaneously on several aspects of a problem.