The nurse instructs a patient with vitiligo who is receiving phototherapy to:

A. Patients receiving phototherapy, including ultraviolet (UV) light for vitiligo, are at increased risk of skin damage, burns, and long-term UV-related complications. Wearing protective clothing and using sunscreen on unaffected areas helps prevent overexposure and protects the skin from harmful UV radiation. Protective clothing is a standard safety measure during and after phototherapy sessions. B. Patients should always wear protective eyewear during and after phototherapy. UV exposure can damage the cornea and retina, increasing the risk of cataracts and photokeratitis. Removing sunglasses after treatment is unsafe and can cause eye injury. C. Exposing skin to sunlight for several hours before phototherapy increases the risk of burns and is not recommended. Phototherapy doses are carefully controlled to avoid overexposure. Patients should avoid additional UV exposure outside the treatment schedule. D. Loose clothing such as sleeveless T-shirts and shorts may increase UV exposure to areas that should be protected. After phototherapy, patients should cover treated and untreated areas according to provider instructions, avoiding unnecessary sunlight and friction that could irritate the skin.