In the Witcher book series by Andrzej Sapkowski, as well as in the CD Projekt Red video game adaptations, the character Ciri is known for her distinctive appearance and unique abilities, including her eyes. In the books, Ciri is described as having “ashen hair, gray eyes, and a face like a falcon” (Blood of Elves, p. 29), while in the video games her eyes are depicted as a striking shade of green.

While Ciri’s eyes do not change color in the books or games, her ability to travel through space and time using a power known as “Elder Blood” allows her to see and experience events in different timelines and dimensions. This ability, known as “prophecy,” is related to her lineage as a descendant of Lara Dorren, a legendary elven mage who possessed the Elder Blood.
In the video game adaptation of the Witcher series, Ciri’s green eyes are a significant part of her character design, and are often mentioned by other characters. However, there is no indication that her eyes change color in any significant way.
It’s worth noting that in some cultures and mythologies, green eyes are associated with mystical powers and abilities. In Irish folklore, for example, green-eyed people are believed to possess a “second sight” and the ability to see spirits and otherworldly beings. In this sense, Ciri’s green eyes may be seen as a symbolic representation of her mystical abilities and connection to the supernatural.
In conclusion, while Ciri’s eyes are a distinctive and memorable aspect of her character design, there is no evidence to suggest that they change color in any significant way. Her abilities to travel through time and space and see into different dimensions are related to her ancestry and the power of the Elder Blood, rather than any specific physical characteristic.