Can every one see ghosts?

Everybody can but now a days people don't. This is because most people don't focus their eyes to see them. You can only see a ghost if you focus your eyes on them, there has been cases where people 'just saw a glance' of them. In these cases the person's mind was focused that particular second they saw it; mainly because the subconscious mind thinks something is wrong so the mind for a second (sometimes longer) looks to see what it is. However, these day the mind often ignores this message from the subconscious mind resulting in less ghost sightings. But in places like haunted houses, the subconscious mind alert the mind more often resulting in more chances the mind will give attention; this is a bit like when someone tells you something you ignore, if they keep telling you you will be more likely to pay attention.