i never notice him sneezing or coughing.
im quite worried. he's kind of restless unlike before if i turn the light off he usually sleeps afterwards but now he' still awake.
the cage is on its...side? they need height (4' ideally, like 1.3 meter)
you need way more plants and twigs in the cage. they need tons of foliage/etc to climb around on and feel safe. if they don't feel safe, they stress...which leads to tons of other issues
he seems a bit skinny, but i don't see anything else bad...i don't have too much experience though others can comment better on that.\
EDIT: for the eye, he may have something in it; you can try applying a small drop of terramycin on it (i dont know if you can get that in phillipines or what other name it would have) alternatively GENTLY misting him (or using a saline solution if you have the ability) to rinse it may help...but if its soomething comeing from his plant or cage, then the problem may return (all this is assuming he has something in his eye and not some other problem).