| 3. | the eye. |
| 4. | a lens of an optical instrument. |

optic op·tic (ŏp'tĭk) or op·ti·cal (ŏp'tĭ-kəl)
adj.
Of or relating to the eye or vision.
Of or relating to the science of optics or optical equipment.
| optic (ŏp'tĭk) Pronunciation Key
Relating to or involving the eye or vision. |