With the eye issue combined with the fact that he's not eating, I'm guessing that the main issue is that coil
UVB bulb. They often cause eye issues, and as Cooper said, even though it's a 26 watt
UVB bulb, the
UVB light emitted is actually quite low, and only focused on one particular spot. Dragons need strong
UVB light for at least 13 hours every day, along with a bright-white colored basking bulb. And using a long, strong UVB tube that is at least a 10% UVB tube (10.0 or higher) that is inside a long tube fixture with a metal reflector behind the tube so that the
UVB light is reflected all throughout the tank is what they need. Without adequate
UVB light he will have no appetite, become lethargic, and eventually develop a severe calcium deficiency and MBD. Then the coil bulb itself is what often causes eye and neurological damage, that's pretty common.
As Tracie already recommended, you need to get him a long UVB tube and fixture with a reflector, preferably a stronger T5 strength UVB tube, I'd just skip over the much weaker T8 UVB tubes, as you must have them strapped to the underside of the mesh lid, have them within at least 6" of his basking spot/platform, and the T8 tubes have to be replaced once every 6 months as they stop emitting any
UVB light at 6 months old. The much stronger T5 UVB tubes only need replaced once a year, and they can sit on top of the mesh lid just as long as they are within at least 10-11" of his basking spot/platform. I think if you get him a T5 UVB tube and fixture with a reflector ASAP both the eye issue and the appetite issue will resolve themselves.
The Reptisun 10.0 T5HO UVB tube and the Arcadia 12% T5 UVB tube are the 2 UVB tubes most often used by experienced breeders and owners. You can order a 22" Reptisun 10.0 T5HO UVB tube on Amazon.com for about $28 shipped, about half of the cost if you can find a 10.0 T5HO tube in a pet shop (usually you only see the weaker T8 tubes, or only 5.0 T5HO tubes in a Reptisun package deal, and a 5.0 tube is not adequate for a Desert Reptile). They also sell a 24" T5-rated tube fixture with a reflector for about the same price, so for about $60 shipped on Amazon.com you can get both the 10.0 T5HO UVB tube and a fixture for it.