Optics doesn’t work that way. If there were a screen implanted into your eye, you wouldn’t be able to see anything on it.
Yeah, I hate when I have to do the firmware updates on mine!
Also your ophthalmologist would notice this magical display screen cum camera as soon as they looked in your eye.
There would probably be a big market for an injectable cum camera.
Oh, they see it. But they’re part of the plan and keep quiet.