A section of bamboo (with both ends removed) and cork tree bark (coarse bark removed, finely scraped, and packed into the bamboo).

bubble_chart Preparation and Dosage

Stand bricks upright, place bamboo on top of the bricks, and place clean bowls at both ends. Use dry bamboo to burn and let the liquid drip out, collecting it all. Dip a copper hairpin or chopstick into the medicine and apply it to the eyes.

bubble_chart Indications

Red eye nebula.