We have an employee that has recently had shoulder surgery. All of our workstations are all desktop PC's, no laptops, tablets, etc... By the end of the day, this employee has a lot of discomfort in their shoulder from moving around the mouse all day.
We have looked at the options of getting a trackball mouse, such as this one here or a USB touch-pad like this one. Having their arm extended out using the PC all day doesn't bother them that much, it's just all the rotation from using the mouse.
What other options can I look at to help this user out and ease their discomfort during the work day with their shoulder, specifically when it comes to using the mouse? Also, what other options can I present to management that could accommodate this user in the future? This is a long time employee so they will be here for the long haul.
Edit: To answer the question of what role this user performs, they are our Credit Manager for Loan Processing. So they are constantly going through forms, paperwork, switching between different screens, etc... a lot of mouse movement and keyboard usage as well.