Glasses that can answer what’s in front of you

I’ve never really looked deeply into AI glasses, but I’ve always been intrigued on why we haven’t came up with the technology to see something in front of us and it gives us the answer. Like with a multiple choice answer for a problem. Is there tech like this out there yet?

If so please drop the brand etc. Currently taking 3 diff sciences in my college for my degree and Jesus it’s almost impossible to study everything I need to for these exams.