Is iridology legitimate or quackery

Iridology, the practice of examining the iris to diagnose health issues, is widely regarded as quackery by the medical community. Scientific studies have not provided substantial evidence supporting its efficacy, and it lacks a biological basis. While some practitioners claim it can reveal information about a person's health, most health professionals advocate for conventional diagnostic methods that are proven to be effective. Overall, reliance on iridology can lead to misinformation and delayed medical treatment.