title: A dosage aid for patients with impaired vision.
mesh_terms: D003930:Diabetic Retinopathy / Q000188:drug therapy*; D007267:Injections / Q000295:instrumentation*; D007328:Insulin / Q000008:administration & dosage* / Q000627:therapeutic use; D009339:Needles; D013594:Syringes
chemical_list: D007328:Insulin