GB1 Pupil Crevice

Reviewed by · Licensed Acupuncturist & TCM Physician · Last reviewed June 2026

GB1 (Tongziliao, “Pupil Crevice”) is an acupuncture point on the Gallbladder Channel Meridian. It is located lateral to the outer canthus, in the depression on the lateral orbital rim. It benefits the eyes, clears heat, dispels wind.

Location

Lateral to the outer canthus, in the depression on the lateral orbital rim.

Needling

Oblique or transverse insertion 0.3-0.5 cun. Avoid puncturing the eyeball.

⚠ Eye risk: needle along the orbital rim only; never angle toward the eyeball.
⚠ Direct/scarring moxa traditionally avoided here (face / sensory organ — scar & burn risk).

TCM functions

Benefits the eyes, clears heat, dispels wind.

Indications

Eye pain, redness and swelling of the eyes, blurred vision, headache, facial paralysis.

Clinical notes

GB1 is a primary local point for eye disorders, particularly those affecting the outer canthus, such as redness, swelling, pain, and blurred vision. It effectively clears heat and dispels wind from the eyes, making it useful for conjunctivitis, glaucoma, and night blindness. As a local point, it is often used with BL1 and ST1 for comprehensive eye treatment.

On the Gallbladder Channel channel

GB1 is one of 44 points on the Gallbladder Channel Meridian. Nearby points:

Frequently asked questions

Where is GB1 located?

GB1 (Tongziliao) is located lateral to the outer canthus, in the depression on the lateral orbital rim.

What is GB1 used for?

GB1 benefits the eyes, clears heat, dispels wind. Common clinical indications include eye pain, redness and swelling of the eyes, blurred vision, headache, facial paralysis.

How is GB1 needled?

Oblique or transverse insertion 0.3-0.5 cun. Avoid puncturing the eyeball. Caution: ⚠ Eye risk: needle along the orbital rim only; never angle toward the eyeball. ⚠ Direct/scarring moxa traditionally avoided here (face / sensory organ — scar & burn risk).

Which meridian is GB1 on?

GB1 is a point on the Gallbladder Channel Meridian (Zú Shàoyáng Dǎnjīng).

Interactive body mapConditions & evidenceFind an acupuncturistTCM glossary
⚠️ This page is for general education and is not medical advice. Acupuncture is a traditional practice; evidence varies by condition and study quality, and individual results differ. It does not replace diagnosis or treatment by a licensed professional. Always consult a qualified acupuncturist or physician.