What are the contraindications for using Class IV laser therapy?

Class IV laser therapy has specific contraindications that must be considered to ensure patient safety and treatment efficacy. One significant concern is the use of laser therapy on individuals who are pregnant, have malignancies, or are at risk of direct exposure to the eyes.

Pregnancy represents a period when certain treatments must be approached with caution. The effects of laser exposure on fetal development are not fully understood, so it's typically advised to avoid laser treatment on pregnant patients.

Malignancies are another critical contraindication. Laser therapy can stimulate cellular activity, which might inadvertently promote the growth of cancer cells or interfere with existing treatments.

Additionally, direct exposure to the eyes is a serious concern since Class IV lasers produce high-intensity light that can cause severe damage to the retina. It is essential to protect both the patient's and clinician's eyes from any direct exposure during treatments.

Thus, the key contraindications associated with the use of Class IV laser therapy are highlighted by the inclusion of these factors, making C the correct response.