She should also have a fresh "salad" every day. A great resource for what bearded dragons should, and shouldn't, eat is available at beautifuldragons.com. Most people feed a combination of collard greens, dandelion greens, kale, squash, etc. and I mist my veggies for an additional source of hydration on top of baths.
If the stick on thermomator is correct, which is doubtful, you'll need to get the temps for her basking spot up as bdalton pointed out.
How old is the reptisun? Has it been on the screen? You'll need a new one, because she didnt just happen to get MBD, there has to be lack of UVB and calcium. The reptisun is one of the two UVBs that is most reccomended because it gives off the right amount of UVB for bearded dragons, so your bulb is probably either old, defective, on top of a screen or too far away. They need to be replaced every 6 months, but even if it's a new bulb I would get another just to be safe.
Did you put a white/clear house bulb in for her and turn off the red light? The red light probably hurts her eyes and the bright white protects their eyes from UVB.
If your stick on thermometer is reading 80, the basking temp could be anywhere from 85-120, you really have no idea without the probe, so it's good your getting it. They need minimum of 95 degrees to be able to digest food.
So, I just returned from our visit to the herp vet. Number one - she does not have MBD. I don't know what exactly you saw in the three photos I attached that made you confident enough to give a diagnosis. The vet was very pleased with her overall health, with the exception of the growth over her eye. To determine its precise cause will take a biopsy. The vet said that the necessary surgery to get a piece to biopsy might be more damaging than the bump itself. She advised that we monitor its size and watch for any changes. Other than that, Spiky is very healthy. The vet did reiterate the suggestion to replace the UVB bulb every 6 months.
Can you post up a picture of your dragon. A full body shot from a few different angles and not just a close up of the eye?
I think the suggestion that it could be MBD came from the fact that in the picture you provided, the spine looked slightly crocked, which I agree with, it did. But it could have just been the picture, so some more full body pictures would help clear that up.
Did you take her to an experienced herp vet?
To say that the vet was very pleased with the health of the beardie pictured, I'm just not sure were seeing the same dragon.