瞳

1. Origins, structure, and basic meaning

• Structure: 瞳, read ひとみ, refers to the pupil of the eye.
• Basic usage: It is used to describe pupils, light in the eyes, or an expression conveyed through them.

2. Common pitfalls and similar expressions

• The eye and its focal point
  • 目 is the broader word for an eye, while 瞳 focuses on the pupil. In expressive language, it can also evoke a gaze or look.
• Whose eyes
  • Use の to link the owner, as in the example 猫の瞳.