Having sensitivity characteristic similar to the human eye response. A photopic filter will have a band pass between 400 and 700nm with its highest transmission at 550nm with a spectral responsivity specified by CIE. Found on http://www.intl-lighttech.com/support/glossary
photopia, photopic, photopic vision 1. Relating to vision with the normal eyes in bright light; for example, day vision. 2. Pertaining to vision in the light; said of the eyes which have become light-adapted. Found on http://www.wordinfo.info/words/index/info/view_unit/1483/5