In recent years, smartwatches and smart rings have grown increasingly popular, adorning the wrists and fingers of consumers who use them to monitor their exercise, sleep and heart activity. Now, medical device companies, including north suburban-based Abbott Laboratories, are hoping health enthusiasts will embrace a new type of wellness accessory: wearable sensors to track glucose levels. Unlike previous, similar devices, the new ones don’t require prescriptions and aren’t just for diabetics.