Mouse used to be mechanical: actually has a ball that touches two rollers (one vertical, one horizontal) so you can see the X-Y movements.
Then people came up with special optical sensors that scans the surface below X times a second, using light, and detects movement by comparing it against previous scans. No more balls, no more mechanical failures, dirty rollers, and so on. However, it require special mousepads. Thus, OPTICAL mouse.
Then they came up with sensors and technology that do NOT require special pads.
Then they came up with LASER scan instead of regular light scan. for better resolution.
So technically, laser is one subtype of optical. And it strictly refers to the way it senses movement.
It can be both wired, and wireless. I have both (wired at home, wireless for laptop)