Monitor shows undulating tracks like worm trails that seem to be burned into screen. Any ideas?

Question

The trails run from top to bottom near the middle of the monitor.  I've tried cleaning them off and have removed the front cover but whatever they are, they aren't something on the surface. 
The monitor performance is apparently not affected by the marks but they are annoying.  Anyone ever encounter this?

Answer 1

EDIT: To try to work out what those two midden volumes are do I tried this in terminal, gave me this:
[code]
garys-mac-pro:volumes gary$ ls -l -a -i
total 524
  13694 drwxrwxrwt@  7 root  admin     238 30 Oct 22:07 .
      2 drwxr-xr-x@ 38 root  wheel    1360 21 Oct 23:35 ..
      8 drwxrwxrwx   1 gary  staff  131072  1 Jan  1980 Data
      5 drwxrwxrwx   1 gary  staff  131072  1 Jan  1980 Linux
3332740 lrwxr-xr-x   1 root  admin       1 30 Oct 22:03 OSX Maveriks -> /
      2 drwxr-xr-x   1 gary  staff   12288 11 Oct 19:20 Untitled
  47104 drwxr-xr-x   1 gary  staff    2048 12 Sep 17:59 Untitled 1
garys-mac-pro:volumes gary$
[/code]
I presume those ghost type volumes, net and home, are the ones showing up there with names as . and .. and run by 7 root admin. Shouldn't technically I be the user admin since only I use this machine? No idea why i'm listed as gary staff ... Soz for all the questions, I really wanna learn