Ive just noticed two dark/black spots that are starting apear on our Tv Screen .. They are both on the right and left of the screen, I noticed the right hand side one around 6-8 weeks ago and its seems to have 'grown'. Now its joined by its friend on the left hand side.

Anyone know what this is?

Its not a plasma or lcd tv.. Just a Normal 'Old' version

Its coming up to 4 Years old now..

Any Ideas?