Simplify the following text for a Grade 11 native English-speaking person.
Original: He was awarded the Nobel Prize in Medicine and Physiology in 1903 `` in recognition of his contribution to the treatment of diseases , especially lupus vulgaris , with concentrated light radiation , whereby he has opened a new avenue for medical science . ''
Simplified: He won the 1903 Nobel Prize in Physiology or Medicine , for treating lupus vulgaris ( tuberculosis of the skin ) , with light radiation .