Hi there, do you know if the beardie gets any supplements ? Sometimes lack of vit. D can cause eye problems, that or the wrong bulbs. You can put raw honey in the eyes , diluted with a very tiny bit of warm water and apply with a Q-tip . It works like an antibiotic ointment , just be 100 % sure there are no loose insects, especially crickets hiding in the tank that would go after his eyes . If you get the t5 bulb you mentioned that can go on top of the screen as long as it's no more than 12" away. It can go inside at the same distance but no closer. Basking spot needs to be about 100-105, the cool end would be at 80. Don;t soak the dragon at all while he's sick, only if he gets dirty or just once a week if he drinks while soaking. BTW, did you say you're putting moss in the tank ?