I'm only interested if he isn't

This is frustrating.

I love the comparison, but I hate how they are comparing.

They are acting like she is using optics to give herself an advantage. But the device she is wearing is just for comfort and essentially does the same thing as closing one eye and squinting the other.

The little thing over the left eye is basically like an eye patch.

And the thing over her right eye is a mechanical iris, like in a camera lens, but it is NOT a lens.

Different lighting environments are going to be brighter or darker and you may have to squint more or less to let in the same amount of light into your eye. Squinting allows the shooter to get the sharpest possible vision in order to shoot a bullseye the size of a 12-point Times New Roman period.

But if you have to squint for hours for practice and in competition, this can strain your face muscles and become uncomfortable. So this iris basically squints for you.

It's more like wearing comfortable shoes so your feet do not hurt than a lens magnifying the target and giving an advantage.

Both athletes have access to these items. One felt more comfortable without them. The other didn't feel like getting a muscle cramp from squinting all day.

Either would have shot the same if they had or had not used these devices.

Just a funny difference in gear preference.