Now, whether this alteration
may be in the Figure of the _Cornea_, in the motion of access or recess of
the _Retina_ towards the _Cornea_, or in the alteration of a crustaline
humour, if such there be, I pretend not to determine; though I think we
need not doubt, but that there may be as much curiosity of contrivance and
structure in every one of these Pearls, as in the eye of a Whale or
Elephant, and the almighty's _Fiat_ could as easily cause the existence of
the one as the other; and as one day and a thousand years are the same with
him, so may one eye and ten thousand.
This we may be sure of, that the filaments or sensative parts of the
_Retina_ must be most exceedingly curious and minute, since the whole
Picture it self is such; what must needs the component parts be of that
_Retina_, which distinguishes the part of an object's Picture that must be
many millions of millions less then that in a man's eye? And how exceeding
curious and subtile must the component parts of the _medium_ that conveys
light be, when we find the instrument made for its reception or refraction
to be so exceedingly small? we may, I think, from this speculation be
sufficiently discouraged from hoping to discover by any optick or other
instrument the determinate bulk of the parts of the _medium_ that conveys
the pulse of light, since we find that there is not less accurateness shewn
in the Figure and polish of those exceedingly minute lenticular surfaces,
then in those more large and conspicuous surfaces of our own eyes.
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