PSI Indiana Esthetician Practice Exam 2026 - Free Esthetician License Practice Questions and Study Guide

In the context of phototherapy, visible light rays are utilized for various therapeutic purposes, including skin treatments. Visible light can penetrate the skin and is used to target specific conditions such as acne, psoriasis, or eczema. This light can have different effects based on its wavelength, affecting skin cells and potentially promoting healing.

Infrared and ultraviolet light also have therapeutic benefits and are indeed utilized in phototherapy in specific contexts, but the primary type associated with many common forms of skin treatments is visible light.

Although options like infrared and ultraviolet light serve important roles in specialized applications, the question specifically highlights the use of visible light rays, which is foundational in many basic phototherapy protocols. Hence, the focus is accurately placed on visible light as the answer.