P.L., a construction worker, is being seen in the emergency department because of a possible eye injury. He was working without eye protection, and a gust of wind sprayed metal shavings into his face....

P.L., a construction worker, is being seen in the emergency department because of a possible eye injury. He was working without eye protection, and a gust of wind sprayed metal shavings into his face. The physician has instilled fluorescein sodium and has noted areas in the eyeball with green halos around them. 1. What is the purpose of the fluorescein sodium, and what is indicated by the green halos? 2. P.L. is sent to an ophthalmologist for further treatment. What eye medication do you expect will be used for the next procedure? 3. After the procedure, P.L. receives a prescription for dexamethasone ocular ointment, to be administered three times a day. What specific patient teaching information will the nurse share with P.L.? 4. How could this have been prevented?