In the lab, Lauren laments that "the sphygmomanometer goes next to the opthalmoscope, not the stethoscope". Everyone has their own way to organize tools based on their own pattern of using them. But. The opthalmoscope is that hand held gizmo a doctor uses to check the inside of your eyeball. A sphygmomanometer is a blood pressure cuff, and always used with a stethoscope.