There are many reasons why a twist of the wrist may become more difficult. Simple tasks like opening jars, and even turning doorknobs can become painful and problematic for anyone aging.
Coastal Bath & Shower can install lever style doorknobs to provide an easier grip that prevents slipping and can be easily opened with a flat hand if needed. Because the lever style involves a push down instead of a turning motion, it is beneficial for those who may have limited mobility in their hands.
Also, recommend the installation of a rocker switch to toggle lights on and off with a flat hand or motion sensor lighting to illuminate without the need for switches.