Emphasizing Reflection:
* Her eyes were like mirrors reflecting the depths of her soul.
* His eyes were as clear as a pristine mirror, reflecting the world around him.
* Her eyes were like a shattered mirror, revealing fragments of pain and joy.
Emphasizing Observation:
* His eyes were like a hawk's, observing every detail with keen precision.
* Her eyes were like a camera lens, capturing every fleeting moment.
* Their eyes met, like two mirrors facing each other, seeing into each other's thoughts.
Emphasizing Beauty:
* Her eyes were like twin pools of liquid gold, shimmering with a captivating beauty.
* His eyes were as bright and alluring as polished silver, reflecting the brilliance of his spirit.
* Her eyes were like two stars in the night sky, sparkling with an ethereal glow.
You can choose the simile that best fits the context and the feeling you want to convey.