Summary of the Invention
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The invention is a system of spectacles design and manufacture.
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Background:
Human vision is predicated on the formation of a real
image on the retina in the fundus of the eye.
Because of variations in the refractive indices of the 
optical media of the eye, 
variations in the curvature of the cornea
and most significant, variations in the axial length of the eye,
various refractive imperfections of the eye arise,
called ametropias
which, to the extent that 
they are mathematically regular, are susceptible
to correction with spherical or cylindrical lenses,
or a combination thereof.
Such lenses are customarily suspended in air 
in from of the eyes in a spectacles frame.
This frame is supported on the wearers face
by a nosepiece and by sidepieces extending onto the external ears.
Current practice entails the design and manufacture of artfully
designed and executed frames of plastic,
metal or a combination of both.
Such frames have ellipsoidal bezels 
which retain lenses of suitable shape.
Because the refractive errors in the two eyes
are independent of each other and vary among individuals,
each pair of spectacles must be assembled
to the prospective wearers prescription.
Because lens shapes vary with the frames chosen
and because lenses of circular shape,
or of any other standard size or shape
are rarely if ever employed,
the the assembly of each pair of speactable entails the precision
cutting and polishing of the edges of a lens of appropriate
spherical and astigmatic power,
to locate the optical centers of the lenses,
to obtain the correct axis of the astigmatism,
and to fit the finished lens into the selected frame.
Furthermore while a given frame may be reused by 
subsequent insertion of suitably edged lenses,
the lenses themselves, once they have been edged
to fit a given side of a given frame, 
can be re-edged only to fit a smaller frame
and cannot be used in a larger frame at all.
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The currently prevalent procedures for fitting spectacles lenses
are both labor and materials intensive.
Because of the large number of frames of different sizes and styles
that must be stocked, and because of the need for individual
grinding and fitting of lenses, 
the obtaining of even simple spectacles
has become disproportionately expensive
and has become a luxury,
if not indeed unattainable
for many less affluent patients.
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The optical devies involved are simple
and inherently inexpensive to manufacture.
The present methods of spectacles manufacture and distribution
have been driven by two forces, 1) the desire for individualization
in appearance. In as much as the prominent location of spectacles
on the face makes them an important identifiable factor in individual
appearance, the size, shape, and color of the spectacle frames
and the configuration of the spectacle lenses are major cosmetic issues,
and issues of style in eye wear are analogous to such issues for
any other type of apparel.

Implementation:
Spectacles consist of lenses of standard shape
clamped or otherwise supported in a face plate.
A preferred implementation entails
a circular lens clamped held in the bezel of a face plate.
which constitutes the edge of a diaphragm or face plate.
the face plate is bisected
in one or both extremities of one of its diameters.
the two halves being susceptible to separation
at least sufficient to permit
insertion of the circular lens into the bezel.
The two halves of the face plate may themselves
be clamped in the bezel of a glasses frame,
hereinafter the frame bezel.
The frame bezel is ovoid,
although in certain instances
it may be circular or angular.
The face plate may be fused with the frame.
In this case, the bisection of the face plate must extend into the frame 
at the inner, or more likely the outer rim.
The face plate, like the frame itself,
is of evident cosmetic importance.
It may be translucent, transparent or opaque.
It may reflect or refract or filter incident light.
It may be made of diverse materials.
Images may be applied to it,
in all manner in which images may be applied to the surface
of thge given material, including etching, engraving, drawing,
painting, photolithography,
the permanent or temporary application
of painted or printed or otherwise decorated film
of metallic plastic or other materials.