I like Terramycin Eye Ointment. It works in terms of ridding the animal of its infection and the bacteria that caused it. But like I've mentioned before, treating the eye infection is only half the battle. Antibiotic in its nature will also weaken your chameleon's eye/s. Once the conjunctivitis...
That is actually a pretty good theory and might very well be one of the reasons. Aside from vitamin deficiency in causing eye illness/es, I believe that dust and man-made pollutants are also the culprits. Dust and pollutants tend to build up around where we are rather than in the wild. Reptiles...
It is highly possible that the Ficus tree is the culprit. Treating his conjunctivitis is only half the battle, let me know if you have a problem feeding him.
The black lines around the eye turrets leading to the face exist in ALL male Panthers that are sexually mature. Only certain emotions will trigger it however. I'll let you find out.