One of my friend's daughter was taken to an eye hospital.  There was actually no complaint from the child.  But only thing was that the child was looking at the TV very closeby.  Even if the child is put back, after sometime the child goes very near to the TV and watches it.  The Doctor has told my friend that the child is suffering from cylindrical power.

This seems to be a new eye problem.  Most common eye problems are short sight and long sight.  Can anyone throw some light on this eye problem, like how to rectify it and why it has occured etc.,?