A clairvoyant sees images and sometime times they see spirits. A clairaudient hears voices and sounds. A clairsentient feels and senses emotions and pains and they also smell odours, both nice and not so nice.
Some clairvoyants get a mixture of senses. I myself hear, see and feel, which is very useful. I am a spiritualist medium and refer to myself as being clairvoyant.
Psychics can be clairvoyant, but they only see everyday images and do not see spirits.
Some associate being clairvoyant with fortune telling. Fortune tellers may well be clairvoyant, but I do not personally believe anyone can tell you the future, as we all have free will and can change the course of our own lives in an instant.
Mediums get their images and voices via the spirit world and they use the gift to give comfort to the bereaved and upliftment to help them cope with their lives. Proving life after death is a fact helps those who are mourning a loved one.
If you are seeing images or people, or you are getting any of the events mentioned above, then you should seek help to develop your newly recognised gift. You may have had the gift a long time but only just become aware of it.
If I can advise you further then please email me. Enjoy your God given gifts!