(n.) The science of the refraction of light; that part of geometrical optics which treats of the laws of the refraction of light in passing from one medium into another or through different mediums, as air, water or glass, and especially through different lenses; -- distinguished from catoptrics, which refers to reflected light.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). dioptrics. Retrieved September 20, 2026, from http://smartdefine.org/dioptrics/definitions/1997850 |
| Chicago | Webster's. 2011. "dioptrics" http://smartdefine.org/dioptrics/definitions/1997850 (accessed September 20, 2026). |
| Harvard | Webster's 2011, dioptrics, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/dioptrics/definitions/1997850>. |
| MLA | Webster's. "dioptrics" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/dioptrics/definitions/1997850> |