everyday ,    alice’s natural born eye color was brown, but this was adjusted after her rebirth as a vampire –– the brown hue remained as a base color, but it has an overwhelming golden sheen atop it, now. see below.

visions ,      alice’s eyes go milky when she’s having a vision, but the intensity of the change is dependent on the focus she’s putting to the vision. the image on the left below is more accurate to a vision she’s giving passing interest towards. the image on the right would be due to various reasons :  that she’s looking for something, that she’s focusing on a vision to further contextualize it, that she’s being overwhelmed by a cluster of visions at the same time. typically, the cloudier her eyes, the more intense the vision, and the less focus she’s able to extend to her surroundings. humans typically take no notice of the change –– it appears much more subtle to an untrained eye, and typically only other vampires are attuned to noticing it. some other supernatural creatures, those with heightened senses, may also be able to spot the change. 

thirst ,     following the above concept, the change of alice’s eye color when it comes to thirst wouldn’t actually be like ... that perceptible to an unsuspecting human. i think it’s another subtle change, especially for vampires with enormous self control. that said, i would say when it gets down to it, if she’s starving, her eyes get intense. it’s hard to describe the visual effect, but they’re sharper. more alert (depending on just how long she’s been without blood – there would come a point where starvation dulls senses, she’s typically always been able to avoid that & other subsequent consequences). they do get a little darker.