We Are Familiar With The Effect When
Polished And Wet Surfaces, Such As Glass, Stone, And Water,
Shine Crimson In
The light of a setting sun; but there is also
the fact, which is not well known, that the eye
May show its
own hidden red - the crimson colour which is at the back of the
retina and which is commonly supposed to be seen only with the
ophthalmoscope. Nevertheless I find on inquiry among friends
and acquaintances that there are instances of persons in which
the iris when directly in front of the observer with the light
behind him, always looks crimson, and in several of these
cases. the persons exhibiting this colour, or danger signal,
as it may be called, were subject to brain trouble. It is
curious to find that the crimson colour or light has also been
observed in dogs: one friend has told me of a pet King
Charles, a lively good-tempered little dog with brown eyes
like any other dog, which yet when they looked up, into yours
in a room always shone ruby-red instead of hyaline blue, or
green, as is usually the case. From other friends I heard of
many other cases: one was of a child, an infant in arms, whose
eyes sometimes appeared crimson, another of a cat with yellow
eyes which shone crimson-red in certain lights. Of human
adults, I heard of two men great in the world of science, both
dead now, in whose eyes the red light had been seen just
before and during attacks of nervous breakdown.
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