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.

Date:
1840
Catalogue details

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 the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    ring sleep, and which, collecting at the roots of the eyelashes, acts as a cement, and often becomes so hard, that it requires long continued bathing with warm water before the eyelids can be opened. The above symptoms of chronic inflammation of the eyelids are to be regarded as merely premoni- tory of those more serious ones occasioned by dis- ease of the nervous organs of the eye. In some cases they are altogether wanting, and the gradu- ally increasing insensibility of the retina to light is the first thing that alarms the patient, and makes him seek for medical assistance. But in other cases, inflammation of the lining membrane of the eyelids continues for a long time, unaccompanied by any affection of the retina. When this happens, it often causes the total destruction of the eyelashes, and a thickened callous state of the lids, particularly of the lower ones, which, in consequence of the excori- ation from the constant trickling of the tears over the cheeks, become permanently everted, and give rise to much deformity. Such cases, however, are ex- ceptions ; and in general, long before this, symp- toms of disease of the retina begin to shew them- selves, if the eyes are still much exposed to the injurious action of artificial light. Wlien once in- flammation of the lining membrane of the eyelids becomes a chronic affection, it greatly assists the action of the artificial light in causing insensibility