What is a potential risk of Class IV lasers when used improperly?

Class IV lasers, when employed inappropriately, indeed pose significant risks, particularly to the eyes and skin. These lasers emit high levels of power compared to other classes, making them capable of causing burns or thermal damage upon direct or reflected exposure. The ocular structures are especially vulnerable because even a brief moment of exposure can lead to permanent vision loss. Protective eyewear specifically designed for the wavelength being used is essential to mitigate this risk.

Additionally, improper use of Class IV lasers could lead to unintended injuries in patients receiving therapy, as areas of focus may not be correctly targeted. This highlights the importance of adequate training and adherence to safety protocols when using such powerful devices to ensure both practitioner and patient safety.

The other provided choices do not accurately represent the hazards associated with Class IV lasers. Selling lasers to untrained personnel is a regulatory and ethical issue, rather than a direct risk of the laser itself. The notion that Class IV lasers have no known hazards is incorrect, as their potential for harm is well-documented, especially concerning eye and skin damage. Lastly, while improper use may affect treatment efficacy, the more pressing concerns center on the immediate physical safety hazards they present.