Is it true that all adults have the same eyeball size on average?
Correct answer: Yes, it differs by only one or two millimeters

Lunarsea
Oddly worded question: "all the same size on average"...

Rachel
I recently had cataracts removed. My eyeball lengths are 30mm and 33mm. Most people have 25-28mm.

egm-alk
If they differ, then they are not equal!

Nestum
It is good to compare sizes of things