Light therapy modalities include which of the following?

• A. Low power lasers and ultraviolet therapy
• B. Cryotherapy and cold packs
• C. Paraffin baths
• D. Massage therapy

Answer: (A)

Light-based treatments use specific wavelengths of light to interact with tissues and elicit biological effects. Low-power lasers, or low-level laser therapy, deliver gentle, coherent light that can influence cellular activity, helping reduce pain and promote healing. Ultraviolet therapy uses UV radiation to affect skin cells and immune responses, with careful dosing to manage conditions like psoriasis or dermatitis. These are all examples of light therapy modalities because they rely on light energy to achieve therapeutic effects.

The other options are not light-based. Cryotherapy and cold packs use cold to reduce inflammation and numb tissue. Paraffin baths provide radiant heat through warmed wax. Massage therapy involves manual manipulation of tissues. So the combination that represents light therapy is the one mentioning low-power lasers and ultraviolet therapy.