You know, I could have sworn I had one here on my desk. I thought I had a PS/2 mouse that was optical here. But now that I dig around, I think I was mistaken.

It's possible that the PS/2 plug specification doesn't supply the necessary level of power for the LED and/or laser circuitry required for optical mice, thus making PS/2+Optical impossible. On the other hand, something in my brain is tickling me, telling me that once I used to have a PS/2 optical mouse.

Anyone know for sure if such a beast ever existed? I'm curious.