From the manufacturer's website:
Eyedrop bottle provides easy grip action with minimum effort. Clips onto eye drop bottles to provide extra leverage - just slip the neck of the eyedrop bottle into the device and it's ready to use. Excellent solution for people with arthritis and dexterity issues. Developed to make self administration as easy as possible – improving patient compliance and their reliance on others.
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.