Sara can’t really use the product
Her sense of touch is too light
The buttons are too far apart (Closer, and it might work)
Barely moves her index and thumb
Can’t put her fingers down -> Buttons could be directly underneath her fingers (but it has to be strapped)
She can’t apply pressure (Lack of mobility)
Down/Up is easier than Left/Right
Joystick thing might work as long as you can strap her hand onto it to be able to grasp it.
“Slot actuator”
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Try: Light Receptor