When we talk about synonyms for the phrase "wistful eye," we can find a range of alternatives that convey a similar sentiment or feeling. Some of these synonyms may include "wistful gaze," "nostalgic look," "longing stare," or "dreamy expression." These phrases all suggest a sense of introspection and reflection, often with a tinge of sadness or yearning for something that has passed or may never be achieved. Depending on the context, we might also use synonyms like "yearning glance," "regretful eye," or "melancholic stare" to capture the same emotion and implied meaning. Ultimately, the right synonym will depend on the specific nuances and associations of the phrase in question, as well as the broader tone and theme of the writing or conversation.