Thank you for waiting. There are a few things you can try. Switching away from the coil UVB light is a good idea. Infrared can also cause problems. It's betetr to use a regualr incandescent bulb, and only leave it on in the daytime. It's ok for night temperatures to drop into the seventies. However, I suspect an eye infection. If you use sand, crushed walnut, or any loose substrate, I would switch to a solid one like reptile carpet or ceramic tile. Dust and minute particles from loose substrates are a leading cause of eye irritations, which often lead to infection. You can put a drop of saline solution (the kind made for contact lenses) in the eye several times a day. Some will seep in around the lid even if it is closed.
You may also want to consider using an actual eye antibiotic. Here is a reputable source where you can order one:
If none of these measures helps, it would be best to see a vet. This link will take you to a directory of reptile vets:
If you have more questions, just let me know. I hope Ruby will reacha full recovery.
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