| http://www.w3.org/ns/prov#value | - For example, with reference to FIG. 21, the central or geometric axis 2810 of the eye is defined by guide 2860 which in some cases is a lens which fits the curvature of the front of the eye and, in some embodiments, can be assumed to be the treatment axis; the x-ray source is then offset a known angle ?? from the central axis 2810.
|
