The introduction of the slitlamp of Gullstrand has opened to ophthalmology an entirely new field for clinical observation and diagnosis. It has created what may be . termed an "Histology of the living eye". . Normal and pathologie conditions heretofore established only anatomically can be directly observed in the living eye. lt shows us not only structures that are known, but in addition aseries of observations on histological details, heretofore impossible. These structures, owing partly to their delicacy. , were formerly sacrificed in the process of fixation, or it was impossible to further...