Thread: Has I understood the thing about Lucid Dreaming? ~

No, it is actually quite different from what you said.
Lucid dreams can also occur while going to sleep normally, meditating and all of these other methods are used to be lucid more often, and even become lucid at any time when you get the hang of it.
What you described sounds like the WILD technique, here is an excellent tutorial about it.
WILD (Sageous)

Also, you don't open your eyes while lucid dreaming, lucid dreaming is no different than regular dreaming.
The difference is, that in a lucid dream you are aware that you are dreaming, and it can look as real as waking life.
You see things with "your minds eye", which is basically just you, well, dreaming.

If you are willing to spend money in your journey to lucid dream, I recommend a book named "Exploring the World of Lucid Dreaming", by Stephen Laberge.
There are also quite a few very detailed and useful tutorials here on DreamViews.
(Tutorials)

Happy dreaming.