On the influence of artificial light in causing impaired vision : and on some methods of preventing, or lessening, its injurious action on the eye / by James Hunter.

  • Hunter, James, M.D.
Date:
[1840]
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Licence: Public Domain Mark

Credit: On the influence of artificial light in causing impaired vision : and on some methods of preventing, or lessening, its injurious action on the eye / by James Hunter. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    CHAPTER II. CAUSES OF THE INJURIOUS ACTION OF ARTIFICIAL LIGHT. Proximate causes of Amaurosis or Nervous Blindness—Eationale of the production of Light by Combustion—Sir Isaac Newton's dis- covery of the Compound Nature of Sun Light—Difference in the Composition of Natural and Artificial Light—Comparative purity of Light obtained by the combustion of different substances—Causes of the different appearance of Colours as seen by Natural or by Artificial Light—Effects of the peculiar Colour of Artificial Light on the Eyes —Table of the force of the different coloured Eays—Heating power of Artificial Light—Effects of the Carbonic Acid Gas generated during Combustion—Injurious effects of an unsteady or improperly placed Light. Impaired vision from disease of the nervous or- gans of the eye, may arise from several distinct morbid conditions, either of the organ itself, or of those other organs which are connected with it by continuity or contiguity of structure, or by some peculiar sympathy. These states are termed the proximate, or pathological causes; in contradistinc- tion to the external or visible agencies, which, in medical phraseology, are called the remote causes. The principal pathological, or proximate causes of amaurosis are,