Adverb
By optics or sight; with reference to optics.
Source: Webster's dictionaryoptically distorted Source: Internet
Aiming the missile was simple; the gunner simply kept his gunsight on the target, while electronics in the sighting system tracked the missile optically and sent corrections through an IR link (similar to a TV remote control). Source: Internet
All weapons were aimed optically with targeting computed by analog electrical instrumentation. Source: Internet
Another popular effect for flooring and table tops is polished concrete where the concrete is polished optically flat with diamond abrasives and sealed with polymers or other sealants. Source: Internet
An optical keyboard technology utilizes light-emitting devices and photo sensors to optically detect actuated keys. Source: Internet
Binary stars are often detected optically, in which case they are called visual binaries. Source: Internet