i think i know why they close their eyes,
i have 4 babies panther chameleon in 1 cage, they are 1 clutch, but i ever seperate them 2 and 2 for a few days, and put them back in large cage 45 x 45 x 90 cm
now, 1 of them feel unwell.
I make a new cage to seperate the others, hope it can reduce...