Yep, did the vet ask about your set up? His eyes are being effected by a combination of a poor
UVB light and the wood chips, which are horrible for bearded dragons. You need to get those wood chips out of his tank immediately, they are not only scratching and irritating his eyes (tiny pieces of wood and wood dust actually get inside their eyes), but it's a massive impaction risk. Little pieces of wood splinter off from the larger chips, and they end up ingesting them and becoming impacted. Plus, the bacterial infection in his eyes is being harbored in the wood chips and is reinfecting his eyes over and over again. So no more loose substrate, for now dump out the wood chips, completely disinfect his tank and everything inside of it, and put down paper towels, which can be thrown away and replaced when they get dirty. You can put down ceramic tile or non adhesive shelf liner if you want to later, but for now you must get the wood chips out of there.
Your Reptile One UVB tube is junk, it actually does put out appropriate UVB from what I've read, the problem is that they also emit horrible, eye-damaging rays along with the
UVB light. You need to buy a Reptisun 10.0 (not a 5.0) T8 tube the same length as the fixture you already have, and make sure that it is mounted INSIDE OF HIS TANK, not on top of a mesh or glass lid!!!
UVB light does not penetrate glass at all, and that mesh absorbs up to 50% or more of the UVB. So use either 3M Command Hooks or Industrial Strength Velcro (rated up to 16 pounds) to mount the Reptisun 10.0 T8 under the lid, and it must be within 8" inches of where he sits on his basking spot at the furthest for him to receive adequate
UVB light. Also, please make sure your UVB fixture doesn't have any kind of clear plastic or glass cover over the UVB tube, that will block all
UVB light. There should be nothing between your beardie and the actual UVB tube.
As already mentioned, a CHE is not an appropriate basking bulb, they must have bright white light to bask with right alongside the
UVB light, so they get both at the same time! This mimics natural sunlight. So if he's lethargic or not eating it's due to a combination of little to no UVB, inadequate UVB, and zero basking light. All you need is a regular, household INDOOR halogen flood bulb from Lowes, probably either a 75 watt or 100 watt, whichever gets his 3 temperature zones within the correct ranges, which if incorrect can effect his digestion of food.
Basking Spot: 99-103 for an adult, 105-110 for a baby, if he mouth gapes it's too hot
Hot Side: 88-93 maximum
Cool Side: 75-80 maximum
After you remove the wood chips, disinfect his tank, and get him into clean paper towels, you may want to go to Walmart or a drug store and buy a bottle of saline eyewash or Eyedrops that are just saline and nothing else. Wipe the conjunctivitis out of his eyes gently with a tissue, then put a few drops in each eye. I'd do this at least twice a day until they get better.
I'd just turn off that Reptile One
UVB light completely, he can go a week or so without a
UVB light. It's doing no good and it's hurting him. You will need to go out and buy a halogen indoor flood bulb though, and screw it into the fixture your CHE is in. Then turn off that
UVB light and work on ordering or going out and buying the Reptisun 10.0 T8. But that UVB is causing half the problem, so I'd just take him outside for an hour a day until you can get the Reptisun.
I'd bet that his eyes will be 100% better in as little as a week after getting rid of the wood chips and that Reptile One
UVB light.