Sunscreens — MCQs

What is the best range of UV light used for treatment of skin diseases?

How does narrowband UVB therapy work in psoriasis?

A patient presents with a skin rash that is exaggerated on sun exposure. What is the repair mechanism involved in this condition?

A sunscreen ointment has a Sun-Protection-Factor (SPF) of 15. How much UV radiation does it filter out?

Which of the following is NOT a complication of PUVA therapy?

A 12-year-old boy, after spending his holiday on a beach, develops pruritic hemorrhagic vesicles on his cheeks, ears, nose, and hands 12 hours after sun exposure. A week later, the lesions crusted and healed with permanent scars. What is the most probable diagnosis?

Psoralen plus ultraviolet A (PUVA) therapy is useful in which of the following conditions?

Psoralen is used in the treatment of:

What is the wavelength range of UVB rays?

What is the range of light that causes maximum skin damage?