Electro Optics vs Optoelectronics > What's the difference?
I don't agree with what David has said. If you think about it, the first word defines the type and the second defines the object (warning: these terms are used pretty loosely and are probably incorrect).

In electro-optics, the important word is "optics", while in opto-electronics - the main bit is "electronics". Here's a couple definitions from Wikipedia:

Electro-optics


  An electro-optic effect is a change in the optical properties of a
  material in response to an electric field &lt;...>


Opto-electronics


  Optoelectronics is the study and application of electronic devices
  that source, detect and control light &lt;...>