Probably nothing. There is no reference to it to be found anywhere.
Llanelli RFC
Questions asked about optical illusions; 1: What are optical illusions? 2: What types of optical illusions are there? 3: What effects do optical illusions have on the brain 4: What causes optical illusions?
optical axis
light is must for optical microscope while is not necessary for nonn optical one
No, it is not an optical illusion.
The SIIG SoundWave Optical 5.1 Sound card has an optical out
An optical mouse is great! :D An optical mouse is great! :D
optical
No, its not an optical storage device.
The origin for 'optical' is Latin
40 GHz
Optical refers to the eyes or vision. The optical lenses must be ground carefully.