has it's eyes closed, usually they are not feeling well from something, may have an eye infection. If you see no improvement pretty quick, like within a day or so, I would have it looked at.
But I would like to say, for as long as I can remember hearing about substrates , calci sand has always been SHUNNED by many breeders and keepers of all kinds of lizards. It says that it is fully digestable, but infact is known big time for causing impaction. Go on the bearded dragon forum and just mention calci sand, ask what they think, you will start a calci sand riot, they hate it.
It has caused alot impactions with alot of bearded dragons.
I personally would dump it and put your collared thats having eye problems on paper towels, for now until you figure out why his eyes are closed.
Hope he feels better soon, let us know how he does !
-----
PHEve / Eve
Contact PHEve