I have seen this happen (eye enlarging and animal rubbing) and was alarmed at first. Yet it went down almost immediately. In my experience do not use chlorinated water direct use a conditioner to remove it. Do not over do the misting don't mist directly at the animal use a water dripper for hydrating the chameleons. Don't let the humidity get excessively high. My animals do fine even at low humidity and I think it is incorrect that this species requires rainforest conditions. If it does not go down then a simple ointment should fix it.