I remembered wrong. They gave me eye drops for after care cause they removed her eye caps there. Yes, she does use her shed box. Not enough to harm and cause scale rot, luckily. But, she does use it. Other than the eye caps, her sheds are always one piece and rolled up tight lol. She's never had problems with constipation.
But from what I saw online, apparently the artificial tears helps keep the caps moist to help get them off better. That's what I understand anyway.