What Is The Difference Between Crosstalk And Ghosting?

Crosstalk is the incomplete isolation of the left and right image channels so that one leaks (leakage) or bleeds into the other, looks like a double exposure. The perception of crosstalk is called ghosting

Technically, crosstalk is a physical entity and can be objectively measured, whereas ghosting is a subjective term

Another way to think about it: 100% crosstalk is where you're not wearing glasses at all.