A practical treatise on the diseases of the eye / [John Vetch].

  • John Vetch
Date:
1820
Catalogue details

Licence: Public Domain Mark

Credit: A practical treatise on the diseases of the eye / [John Vetch]. Source: Wellcome Collection.

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    atmosphere itself. Catarrhal affections of the bronchial membrane, are therefore confined to cold countries, while a similar inflammation of the conjunctiva is peculiar to countries of a warmer latitude.* It will therefore be conducive to a clear understanding of the subject, to refer first to the circumstances under which ophthalmia exists in those countries of which it may more strictly be considered as indigenous ; and then to describe the appearance which it assumes when it occasionally occurs in this and other ‘colder climates. | It has been observed by travellers, that oph- thalmia isa frequent disease with those who are exposed to the night air in moist and warm coun- tries, and as the deposition of dew in such situa- tions takes place in the greatest abundance, its agency has been often considered as the prin- cipal cause of the disease. As it has been es- tablished, however, by recent observations, that the deposition of dew is the effect, and not the cause of the diminished temperature at the sur- * Although the discharge which takes place in this last men- tioned disease, may and does generally assume more the pro- perties of pus than mucus, I have employed. the term ca- tarrh, to signify this as amore simple and milder form of dis- ease than that which occurs from inoculation or infection, and to which the term of purulent has been more particularly at- tached.
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