Ok great! Was just trying to rule out any possible substrate or sand in the eyes
I know you already gave us details on your lighting, but could you perhaps post a picture of the setup so we could see it? The coils did tend to cause eye issues a few years back but that issue was remedied more or less. Now they would only theoretically cause eye issues if they were too close or the dragon was making direct line of sight with it.
Still, they aren't sufficient for dragons so changing it out is still the best idea
-Brandon