Physics
Scientific paper
Aug 1889
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1889natur..40..342m&link_type=abstract
Nature, Volume 40, Issue 1032, pp. 342-343 (1889).
Physics
Scientific paper
FOR some years past I have been aware that a bright light on a dark background appeared to be surrounded by faint coloured rings, and that these rings were due to something in the eye irself. But I gave them little attention, for I imagined they were formed in the same way as the coronse seen when the sun or moon is covered by a thin cloud; opaque particles in the cornea, or little elevations or depressions of its surface, playing the part of the drops of water in the cloud. This is the view taken in Verdet's great work on the wave-theory of light. ``Les cercles irisés, qu'à la suite de certaines inflammations de la conjunctive on aperçoit autour des corps lumineux, se rattachent à la même cause que les couronnes; ces apparences sont dues à l'existence de granulations trè -petites et sensiblement égales dans la portion de la conjonctive qui se trouve en avant de la corneée transparente'' (Verdet, ``Leçons d'Optique Physique,'' § 79). I have lately discovered, however, that the phenomenon in my own case must be due to quite a different cause.
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