Removing nebula and improving vision

"Removing nebula and improving vision" (Tui yi ming mu) is a fundamental therapeutic principle in Traditional Chinese Medicine (TCM) rather than a single molecular target or receptor. It refers to the clinical action of clearing corneal opacities (known as 'nebula' or 'yi') and restoring visual clarity, primarily targeting ocular conditions such as keratitis, corneal scarring, and early-stage cataracts. This therapeutic category includes various botanical and animal-derived substances, such as Buddlejae Flos and Periostracum Cicadae, which are traditionally believed to treat the eye by clearing 'heat' from the Liver meridian. Modern pharmacological studies have shown that these agents exert their effects by modulating complex signaling networks, including the suppression of TLR4-mediated inflammation and the enhancement of Nrf2-driven antioxidant defenses in ocular tissues. While this concept represents a functional therapeutic strategy in integrative ophthalmology, it does not correspond to a specific protein or isolated biochemical receptor.

Other names

Tui yi ming mu退翳明目Clear nebula and improve visionRemoving corneal opacity and brightening eyesTuiyi Mingmu

The pharmacological mechanism involves both Traditional Chinese Medicine (TCM) and modern biological pathways. In TCM, it works by dispelling wind-heat and clearing liver-fire to resolve ocular opacities (nebula). Modern research indicates that herbs with this function act through the inhibition of pro-inflammatory signaling pathways such as TLR4/NF-κB and MAPK, as well as the activation of antioxidant pathways like PI3K/Akt/Nrf2 and HO-1 to reduce reactive oxygen species (ROS) and prevent apoptosis in corneal or retinal cells.