OptiKey VS EyeMine

Edit: the eye tracking software I wanted to use is ITU Gaze Tracker, which says it requires a camera with infrared night vision. I wanted to use it because it integrates natively with Optikey.

For years, she made do with what she had, but her requests for something better never stopped, so Special Effect eventually turned to developer Kirsty McNaught to find a better way. McNaught started to build a fully custom solution, but quickly realized that she could save a lot of time and effort with open source. The OptiKey project offered the base eye gaze tracking functionality she needed, so she forked it to create EyeMine, an open source interface designed specifically to help people with disabilities play Minecraft with their eyes.

This might help. http://gazehelp.com/eye-tracker-properties-table/ By the way have you seen https://github.com/OptiKey/OptiKey ?

Check this out https://www.specialeffect.org.uk

There's a charity called Special Effect who make specialized controllers for people with disabilities. If you like that sort of thing, go donate to them! They personally look at the needs of their clients and go through several tests and stuff with them. They do amazing work.

In the UK the organisation SpecialEffect (https://www.specialeffect.org.uk/) is dedicated to helping people with physical challenges to play games again. Check them out and maybe ask them if they know a simmilar organisation that is more local to your location.

I'd check out what https://www.specialeffect.org.uk/ do - they do a lot of work attempting to make all games accessible via custom hardware, it's amazing. And, like other commenters have suggested, Microsoft have their "Adaptive Controller" to make it easier to create custom controller setups for your GFs daughter's specific needs i.e. it allows you to add all sorts of different input modules via 3.5mm jacks. Sony were a little slower off the mark than Microsoft in this regard, but they've just this year announced "Project Leonardo", which is their entry into the accessible controller field.

Squadrons and youtubers make some charity events for https://www.specialeffect.org.uk/ .

Every year, people from Reddit pledge bunches of flowers to be placed at Alan Turing's statue in Manchester in the UK for his birthday. In the process we raise money for the amazing charity Special Effect, which helps people with disabilities access computer games.

In support of SpecialEffect, various drivers will stream and raise money for this wonderful charity! So you can donate through them, or directly over at https://www.specialeffect.org.uk