| Answer | Crossword Clue |
|---|---|
| binoculars | An optical instrument with a lens for each eye, used for viewing distant objects |
| monoculars | An optical instrument for viewing distant objects with one eye, like one half of a pair of binoculars |
| microscopes | An optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times |
| microscope | An optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times |
| tachistoscopes | An instrument used for exposing objects to the eye for a very brief measured period of time |
| tachistoscope | An instrument used for exposing objects to the eye for a very brief measured period of time |
