1.) a device that employs a beam of light to facilitate more accurate <#perf=perforation> of stamps during the manufacturing process. 2.) the markings (see <#eedash=Electric Eye Dashes>, <#eemargin=Electric Eye Margin Line>, <#eegutter=Electric Eye Gutter Bar>, and <#eeframe=Electric Eye Frame Bars>) in the <#margin=margins> and <#gutter=gutters> of sheets of stamps that enable the electric eye device to accomplish its purpose of more accurately perforating stamps. Stamps with electric eye markings were first sold in 1935.