目

1. Origins, structure, and basic meaning

• Structure: 目(め) refers to the eye, the organ of sight.
• Basic usage: It is used for closing the eyes against light or looking into someone's eyes while speaking.

2. Common pitfalls and similar expressions

• The eye versus 視線
  • 視線(しせん) means the direction of looking or a person's gaze. 目を閉じる describes closing the eyes themselves, so the two words are not directly interchangeable.