special visual effects, as the wipe or dissolve, created in the camera or especially in a film laboratory by technicians using complex optical and electronic equipment.
- Also called opticals .
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use optical effects in a sentence
At first they seemed to be optical effects, as though the eye itself were playing tricks.Islands of Space | John W Campbell
These different optical effects are classed together under the name of anthelia (from Greek, opposite to, and Greek, the sun).Young Folks' Library, Volume XI (of 20) | Various
Very different optical effects, however, follow if the rays from the various-coloured flames are made to pass through a prism.
Hitherto it had been supposed that double stars were mere optical effects.A History of Science, Volume 3(of 5) | Henry Smith Williams
There are other optical effects to be seen sometimes on the horizon somewhat resembling twilight.Nature's Miracles, Volume 1 | Elisha Gray