Eye

Unicode lists 👁️ Eye among the body parts in the People & Body group. In practice it comes up around 1, body and one.

You can drop 👁️ into chats, social posts, headlines or a bio. On SmileyZone it is filed under Emotions and Feelings. The character has been part of the standard since 2010 (Emoji 0.7). Its code point is U+1F441.

• 👁️ on its own already flags the topic: 1.
• Fits messages about 1, body and one.
• Often seen near 👀 Eyes, 🦴 Bone and 👅 Tongue.

• 👁️👀 – Eye and Eyes
• 👁️👄 – Eye with Mouth
• 👁️🦷 – Eye plus Tooth
• 👁️🧠 – Eye and Brain
• 👁️👃 – Eye with Nose
• 👁️🫁 – Eye plus Lungs
• 👁️🦴 – Eye and Bone
• 👁️🫀 – Eye with Anatomical Heart

Easy to mix up with 👀 Eyes, 🦴 Bone or 👅 Tongue. They sit in the same Unicode subgroup and look similar at small sizes, so it is worth checking the name before sending.