photoelectric cell
photoconductive cell
photocell
electric eye
magic eye

His presence broke the electric eye, and the door, designed to provide safety for crew members, did not close.

He looked up at the new electric eyes, and saw they were following his every move.

From above, a mechanical hand came down, with an electric eye fixed on either side of it.

He also has an electric left eye which may be the source of his power.

There was no way for him to disable the electric eyes.

I have found that the male also has electric blue eyes.

If there were electric eyes here, and men watching them, they could never keep track of the last minute's traffic.

She leaned against the electric eyes to cut off their light.

A security monitor was right there, electric eye focused on him as he tried the door.

You should have had an electric eye to clock them, Inspector.