This morning. I had a dream where I meet an English couple in their house they ask me how well I feel after falling ill . I start by saying I am better, then their baby 2-3 year old girl speaks to me and tells me to talk to her parents about God. I then talk to the couple about Maha Vishnu (Hindu God). They look like they do not take me seriously or do not understand about the Hindu religion. The baby tells me to ignore them and tells me to close my eyes. I do so and I feel the baby touch her head against my forehead as if to activate my third eye. She tells me that she has passed on the power of her third eye to me also. She points to the sky and tell me to point to the sky with my hand, close my eyes and say the name of a Hindu deity, then pull that energy in your hand down onto the floor in front of you. Then say your prayers either to heal yourself or ask for a boon. After I felt my third eye power, I did what she said and called Shakti and asked her to heal me and protect me for re-incarnations, I then opened my eyes. She appeared in front of me and just then a demon appeared to attack me and she took her sword and chopped off the demon's head and then left me, running in the distance. I asked the baby again is it possible to summon any Hindu deity like this, she said yes and also many Mystic Sages. In my wonder I walk away from the house and arrive by the ocean, there are humans trying not to be caught by the giant demons. I look at the ocean and think in my head I must not summon Maha Vishnu for he may appear as Kalki from the ocean or the world would end. I can hear the demons saying that they want the world to end. I wake up thinking this must be a sign
I also felt my third eye actually working in the dream, you know like energy in the centre of the forehead.
Is my mind telling me how to use my third eye power or does this dream mean something else?

I sat on my bed and opened my window.  I closed my eyes and waited for the energy in my forehead to pulsate.  Pointed at the sky and called out Krishna, grabbed hold of that feeling in my hand and then placed my hand on the floor and released the feeling.
Then I prayed that I will get healed from being ill and that I surrender my life to his service.  As I opened my eyes I was suprised to hear some pigeons cooing at the same time as if they were acknowledging what I asked.

Many dreams have significance and meaning to you on a personal, spiritual or material level.  This is certainly something to consider for your own personal spiritual unfoldment.  Always call on God for the highest protection before considering opening the third eye.

Third eye, third eye.  You will know your third eye is open when you see ghost or negatively charged things ACTUALLY following you.  Could be quite scary, but don't worry, just remember all souls or ghost or energies are positive or negatively charged.  Change their negative charges to positive and you will see their shapes change positively.  Don't fight fear with anger.  Pacify the wrath of the diseased soul.  

As for your dream....Did you watch 300 the movie?    could have been effected.  Those images or things tend to lurk in dreams if repressed.  other words, if you don't believe this world is a sort of living hell, then chances are, the images you perceived in this world will find a lurking space and back to haunt you.  Then ultimately, your belief in Hindu Dieties (Vishnu and others) is there to reinforce your believe that "life is good and all things should be good".  Things worked out balanced nicely in your dream.  Not a bad one.