What parameter is crucial in determining laser safety?

The maximum permissible exposure (MPE) is crucial in determining laser safety because it quantifies the highest level of laser radiation that a person may be exposed to without experiencing harmful effects. Understanding MPE is essential for establishing safety guidelines and protocols for laser usage in various settings. This parameter helps ensure that the risk of eye or skin damage from laser exposure is minimized, thereby protecting both practitioners and patients.

While other factors like the type of tissue treated, the distance from the laser source, and the wavelength of the laser used are important considerations for effective laser application, they do not specifically define the limits of safe exposure to laser radiation. MPE directly addresses safety standards and regulatory compliance, making it a fundamental aspect of laser therapy practice.