Solutions optical instrument has 11 entries with similar clues
- lensOptical device used to invert an image
- prismOptical device used to change an image from left to right
- eyelidOptical cover
- visualoptical
- mirageOptical illusion
- eyestalkStem bearing optical organ
- eyedropsExample of optical therapy
- lazy-eyeOptical problem
- naked-eyeView unaided by any optical instrument
- epidiascopeAn optical projector giving images of opaque and transparent objects
- jewellers-rougeFinely ground ferric oxide used as polish for metal and optical glass