For those wishing to open the brow/ajana chakra and other chakras go to this link, which i use much.
But the point of this thread was to focus more on people with open brow chakras already, although i have no problem helping people how to open their own.
so you have your chakra open and ready for use, what do now? well first i suggest maintainance, cause you need to have your energy body maintained for best results, if your body is poorly maintained you will not get a clearest experience out of your spiritual sight.
What are the uses of this eye? everything to do with spiritual sight and perception. Things such as clairvoyance, auric sight and seeing energy are just few of the skills gained with that chakra opened. I must advice that before you open this chakra make sure your root chakra is fully balanced! this is your foundation chakra and it must be in order at all times.
I feel a pulsing in that area what is it?
Well i too once wondered and i learned, many sites say allot of things but i can say its not the case.
If you are feeling a tickling,tingling feeling, you eye is simply active at the moment, i advise you to meditate at the exact moment it does this if you can.
if you are ever receiving pain in that area then its negative energy buildup. Don't fight against the pain, if you do the pain will only increase, i have tried it ! what you need to is cleanse your aura and remove the negative energy with meditation and a use of sage or cedar or any other cleansing tool/herb.
any more questions feel free to ask