Hey I've kind of been following your thread here.
I didn't put my 2 cents in the first day because you indicated lowering the temp helped, so I said OK, sounds like that worked.
I've produced quite a few baby veileds over the years, and have some experience with eyes closing on babies like this. I've bred veileds for 20 years and produced thousands in that time- I produced quite a few back in the 1990s. I'm telling you that up front because I'm about to contradict some of the advice you have been given in this thread. But I'm doing so speaking from experience.
Nearly every time when it was with my babies back in the beginning, the problem could be traced back to not enough supplementation. Either d3 or multivitamin (a or e most likely the culprits). Once I figured that problem out fairly early on, the problem went away.
Babies under 5" in length are especially susceptible, and if your baby is smaller than 3 or 4" really it is small enough that things like shipping and handling from the breeder to the distributor to the pet store can be really hard on it nutritionally as it undergoes periods of fasting and probably poor supplementation and poor feeding as well at a time when it has some very high demands for rapid growth being put on it's system.
I do not believe it is a problem with the temperature. I raise my babies under the same temperatures as my adults and they thrive- rapid growth, strong bones, great behavior and feeding. My basking temps are well into the 90s (possibilities for even warmer) and night temps can drop as low as 50 without problems and I use these temps even for babies born that day if that is what my temps happen to be that time of year.
It isn't your temps. I would be very surprised if it was your tube either. Unless the lighting in your cage is very dim so the pupils aren't contracting when exposed to the UVB.
Most likely your cham needs a little supplementation for several days to get it back on track nutritionally.
What I found that worked best for me in the days when I was figuring this stuff out- mist your chameleon first so he gets his eyes open and drinks. Then immediately offer it several supplemented insects. Try calcium with d3 first, and if that doesn't do the trick, multivitamin the next time, followed by more calcium with d3 the next couple feedings, then the multivitamin again.
This isn't a permanent schedule- it is only until your cham gets it's eyes open and behaving normally. As soon as that happens, go to whatever advice you wish to follow that you get here on the forums about supplementation schedule and you should be fine. My preference is calcium with d3 a couple times a week and multivitamin 1x per week until growth starts to slow, then d3 1x per week and multivitamin 1x per 2 or 3 weeks when I think of it, and no d3 all summer when my lizards are outside. But there are other schedules that work well for other people. Or you might simplify by using the rapeshy all in one product every feeding.
The point is- the first thing I would do is the above. The next guess would be illness from stress and warehousing where it could pick up parasites or something else. But I think the supplementation much more likely ...
so that's a little bit of good news, at least he's not just sitting in one place and completely not moving like he was earlier today.
