When people are without the influence of Jesus Christ in their lives, there is something missing but they don't realize it. They think that they see life the same way everybody else does. They may be happy, but the peices don't all fit together. When these people see the influence that Jesus Christ has in the lives of others, they realize that they don't see clearly. They, most of the time then make the choice to follow Jesus Christ.
As we go through our lives, many people don't realize how much they come to rely on Jesus Christ. They don't realize that without Him everything is out of focus. It is when they turn their backs on Jesus Christ that they see all that he has done for them. When I lost my contacts, life was tough to get around. I was always triping over stuff and struggling. This is what happens when Jesus isn't there. We hit trials and struggles and we have no one to help us.
We all need to see life a little more clearly. We need to up our perscription. We need to remember all that Jesus Christ has done, still does, and will do for us. All of our eye sights can be improved through reading the scriptures, through going to church, and most importantly through prayer. God wants us to see, but He can only help when want him to.