I actually wonder about Y'shtola's method of seeing. The dialog we had made it sound like it was very taxing. Interestingly, in the follow up quests in Motoya's cave a crystal eye that Motoya uses to help her read the Aether is mentioned. I'm wondering if this or an object like it may come into play in the future to aid Y'shtola and lessen the stress using Aether to see puts on her.