Crossword solverSynonyms for optical instrument11 crossword answers for “optical instrument” (7,10), sorted by letter count.How many letters?All1171921031221311411717 letters 1glasses9 letters 2projectorperiscope10 letters 3instrumenteyeglassesbinoculars12 letters 2field glasses(5,7)opera glasses(5,7)13 letters 1esophagoscope14 letters 1oesophagoscope17 letters 1prism spectroscope(5,12)