BLUE TONGUE SKINKS

Hi, I have had my Halmahera BTS for half a year now and everything was going really good. Yesterday morning though I noticed my skink keeping one of his eyes closed. I then picked him up so he would open it and he did. And I really have to say it looks everything else than good. His humidity levels should be fine. They are usually around 75% but in the last one and a half weeks they have been higher (95%) because I put more substrate in (coconut fiber). I feed him mainly with dogfood, lettuce and other types of greens and occasionally he gets some superworms, an egg or some fruit like banana.
I really hope someone can help me as I'm really worried.

Update: He isn't opening it at all anymore, even if I pick him up. I'll try to go to the vet's tomorrow

Good morning, I would suggest a vet appointment asap. Let us know the outcome.

I'm going to the vets tomorrow. I can see he really isn't feeling any good, he's not eating and has hardly moved. Is there anything I can do until tomorrow? I'm really worried

The only other thing you can do would be an ER vet today. Prayers your skink will be ok