IN CONSIDERING a group of diseases in which certain lesions in the eyes may develop, it is necessary to refer to features and conditions peculiar to these diseases which may influence to some extent the signs and symptoms that are likely to occur.
The blood dyscrasias include a very large group of disorders, with a variety of etiologic factors and with certain clinical manifestations. Moreover, there appears to exist a close relationship among many of these diseases, with only certain differences in their causation, which may determine the character of the blood picture, the clinical manifestations and the changes which may occur in the eyes. This is especially true of that part of the group designated as "the anemias."
For the purpose of simplicity, the more important diseases of the blood are here grouped according to the changes which occur in the individual constituents of the blood.
EXCESS OF RED