What is the desert
uvb bulb brand? And is it a long tube or a coil?
The carpet is good that helps rule out the possibility that substrate is in her eyes.
However, eye damage from improper lighting doesnt manifest itself immediately and can take months if not years to show issues.
Without knowing exactly what
uvb bulb you are using, I can point out one of the issues in your lighting being that you mention your uvb, a CHE and a night bulb.
Unless your uvb is an mvb bulb, you have to have a source of uva. Yes uvb bulbs also produce uva but you need a bright white light for the basking spot to protect the dragons eyes. A bright white bulb helps shield and protect the dragons eyes from the damaging uvb rays. if you're using a coil
uvb bulb this damage would be any greater because not only is the uvb Ray's damaging to the eyes in the absence of a bright white light, but the intensity of light coming from the coil bulbs alone has been known to cause eye issues.
And not that I believe the night bulb is related to the eye issue, but at night there shouldn't be any light and dragons can in fact see the light emitted from those so called night bulbs. If you need to add extra heat at night that's where your CHE should be used.
-Brandon