In the Windows Insider newsletter I got today, I found out that the developers at Microsoft have been working on a way for users to be able to control the mouse cursor using only their eye movement. It's still in beta status, and may or may not be included in the next Windows 10 build, but I can see it as being really handy for those without the use of their arms or hands.
https://blogs.msdn.microsoft.com/acc...ody_EyeControl
https://blogs.msdn.microsoft.com/acc...ody_EyeControl
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