(from the article `radiation`) There are a number of diseases in humans and other animals in which light sensitivity is involved; for example, hydroa, which manifests itself in ... Found on http://www.britannica.com/eb/a-z/h/88
(hi-dro´ә) a vesicular or bullous eruption. hydroa vacciniforme a vesicular and bullous eruption on sun-exposed areas of the skin, sometimes preceded by pruritus and a burning sensation; it occurs most often in children and tends to recur each summer. Found on http://www.encyclo.co.uk/local/21001