The Geometrical Axis is one of the axes
through the eye that has been defined and is used as a construct for optical
equipment designers and those working with the physics / optics rather
than the biology / physiology of human vision.
Note that this is not a physical feature of the eye and so
cannot be identified by dissection or by any physical imaging techniques.
The precise definitions of the geometrical axis can vary between texts
so it is important to refer the definition given in papers and documents
using this concept. However, its general location is indicated in our
baasic diagram of the eye.
Other axes through the eye include the Visual
Axis.
The subject of visual (also known as "physiological") optics
is a key component of many courses within the fields of both biology and
physics. It is also an essential consideration in the design of displays
and control units used in many applications from televisions and mobile
telephones to advanced aircraft. In the context of engineering "visual
optics" is one of several medical and psychological topics in the
important area of "Human Factors". |
