The commoner diseases of the eye : how to detect and how to treat them . e fact that in old age the nutri-tion of the cornea is easily lowered, corneal ul-cers are more common in advanced life than inearly youth. As a result of their unsanitarysurroundings and manner of living the poorerclasses are more prone to ulcer of the corneathan the well-to-do. In the former the resistingpowers of the cornea to the entrance of patho-genic microorganisms are insufficient and ulcersare liable to follow abrasions and other minorinjuries of the cornea, especially in the presenceof a previous infected conjun
The commoner diseases of the eye : how to detect and how to treat them . e fact that in old age the nutri-tion of the cornea is easily lowered, corneal ul-cers are more common in advanced life than inearly youth. As a result of their unsanitarysurroundings and manner of living the poorerclasses are more prone to ulcer of the corneathan the well-to-do. In the former the resistingpowers of the cornea to the entrance of patho-genic microorganisms are insufficient and ulcersare liable to follow abrasions and other minorinjuries of the cornea, especially in the presenceof a previous infected conjunctiva. The detection of corneal nicer presents fewdifficulties if it is at all extensive, although small 192 COMMONER DISEASES OF THE EYE and superficial ulcerations of recent origin arccomparatively easily overlooked. In most casesthere will be noticed a slight infiltration of thecornea, giving its surface a steamy appearance,while the epithelium will have lost its polishedappearance, differing in this respect from a truescar, which is covered with normal Superficial Infiltration of the , if the reflection from a window be al-lowed to fall upon the affected cornea the imageof the cross bars will appear broken or irregu-lar. One of the surest means of detecting thepresence of an ulcer is to allow a few drops ofa two per cent solution of postassium fluoresceinto flow over the surface of the cornea. COMMONER DISEASES OF THE CORNEA 198 Fluorescein gr. 8 Liq. potassre dr. I Aquae dest. q. s. ad oz. I This solution renders the denuded surface ofthe cornea green or greenish yellow and accur-ately maps out the limits of the ulcer. Simple Ulcer, the most common variety ofthis affection, is usually due to a slight trauma-tism, for example, a cinder or other particle offoreign substance getting into the eye and abrad-ing the corneal surface. The infection may hefurnished by and be secondary to a diseasedcondition of the conjunctiva, either confined tothe palpebra
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