Which of the following is an example of light therapy?

• A. Ultrasound therapy
• B. Laser therapy
• C. Cold immersion
• D. Whirlpool

Answer: (B)

Light therapy involves the use of specific wavelengths of light to treat various medical conditions, particularly in rehabilitation and recovery settings. Laser therapy is a type of light therapy that uses focused light to stimulate healing in tissues, reduce inflammation, and alleviate pain. This process is effective because it penetrates the skin and energizes cells, promoting faster recovery and better overall results in treatment.

In contrast, other therapies listed, such as ultrasound therapy and cold immersion, involve different modalities that do not primarily utilize light. Ultrasound therapy employs sound waves to generate heat and promote tissue healing, whereas cold immersion involves the use of cold temperatures to reduce swelling and inflammation. Whirlpool therapy also does not fit the definition of light therapy as it utilizes water for therapeutic purposes rather than light. Thus, laser therapy stands out as the correct example of light therapy.