"Si" (四) refers to openness or expansiveness in all directions; "bai" (白) signifies brightness and clarity. This point is used to treat eye disorders, and needling it can enhance vision, hence the name.

bubble_chart Location

Sibai (ST2) acupoint
(adapted from "Meridians and Acupoints")

On face, directly below pupil, in the depression of infraorbital foramen. It is situated on midline of eye, one cun below lower eyelid margin, at midpoint of the line connecting tip of nose and outer canthus of eye.

bubble_chart Anatomy

• Muscle: between the orbicularis oculi muscle and the quadratus labii superioris muscle.
• Nerve: Infraorbital nerve, zygomatic branch of facial nerve.
• Vessels: branches of facial artery and vein, infraorbital artery and vein.

bubble_chart Manipulation

Perpendicular insertion 0.3～0.5 cun. No moxibustion.

bubble_chart Efficacy

Dispell wind, improve vision.

• Classical: red and painful eyes, nebula, twitching eyelid, tearing, blurred vision, palpebral margin itching, crooked eyes and mouth, headache, vertigo.
• Modern: facial nerve palsy, trigeminal neuralgia, keratitis, rhinitis, cholangioascariasis.

bubble_chart Combinations

• Trigeminal neuralgia: Fengchi (GB20), Xiaguan (ST7), Sibai (ST2), Chengjiang (CV24), Hegu (LI4).
• Rhinitis: Sibai (ST2), Yingxiang (LI20), Hegu (LI4).