Hello,
Ok, what is most likely going to be the problem is your lighting.
How long have you had him for again?
The UVB coil that you have, what brand is it? If it is a reptiglo or a reptisun or a zilla, then that is what is causing the problem. Combined with that & the blue light, it is probably causing photo-kerato-conjunctivitis. It can cause an array of problems, so it is imperative that you get that coil light out now. It will damage the eyes because it is emitting low wavelength of UVB which is borderline UVC. The phototherapy phosphor blend that is used for UVB lights was incorrect & the wrong type of glass was used which was allowing that type of wavelength to occur.
The symptoms are lethargy, non eating, or anorexia type of behavior, squinting one eye off & on, or both of the eyes, balance issues.
Here is an article to better inform you.
http://www.uvguide.co.uk/phototherapyphosphor.htm
So do put just a regular bright white lightbulb in for him, & take the coil UVB out until you can get a regular flourescent tube bulb as a UVB. The only 2 that I will recommend are the reptisun 10 or the reptiglo 8.
Let me know how he is doing. Don't give up, ok? I would like to see him pull through!!
Tracie