Abstract
THE OPHTHALMOLOGIC aspects of allergy have occupied a prominent place in the development of knowledge of the subject from the beginning. A number of widely different ocular disorders, both external and internal, are of allergic origin. Dermatitis of the eyelids and conjunctival edema, vernal conjunctivitis, conjunctival folliculosis, subconjunctival hemorrhage, retinal hemorrhage and optic neuritis may be mentioned as ophthalmic conditions that are often due to allergy. Substances to which a person is specifically sensitized, such as plants and their pollens, cosmetics, nail polish, soaps, shampoos, drugs, hair dyes and emanations from fur, feathers and animals, are a few of the great variety of agents which may produce contact dermatitis. Lacquers, paints, paint solvents, refrigerants and other volatile substances used in industry are also frequent offenders. Aside from the local reaction which such agents may provoke, they may, by oft repeated inhalation, give rise to a variety of internal disorders, such
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