Lysimachia, particularly Lysimachia christinae (commonly known as "Jin Qian Cao" in traditional Chinese medicine), has been used in traditional herbal medicine for a variety of conditions, including eye infections. Its traditional use is documented in classic Chinese medical texts, where it is said to "clear heat and eliminate toxins," a concept commonly associated with treating inflammatory or infectious conditions, such as conjunctivitis or other minor eye infections.

However, the scientific evidence supporting the efficacy of Lysimachia for eye infections is limited. Most available studies explore its effects on urinary tract stones, liver protection, or anti-inflammatory properties in general, rather than specifically addressing ocular infections. There are very few, if any, clinical trials or laboratory studies directly investigating its effects on pathogens responsible for eye infections or its safety and efficacy when used in or around the eye. The rating of 2 reflects modest in vitro or animal study evidence demonstrating general antimicrobial or anti-inflammatory activity, but not focused or robust data for this particular indication.

In summary, the use of Lysimachia for eye infections is primarily based on traditional knowledge and historical precedent, rather than strong scientific validation.