LOS ANGELES — Judson Studios, founded 124 years ago, is the oldest family-run art glass studio in the country. It began working with stained glass, a medium whose technique has remained essentially unchanged since the Middle Ages, at a time when Los Angeles was establishing itself as a truly modern metropolis. It continued to design hand-crafted, labor-intensive glassworks throughout the 20th century, applying the centuries-old process to a range of styles and aesthetics, from Beaux-Arts to Arts & Crafts, and Mid-Century Modern. More recently, Judson Studios has pioneered the new technical practice of fusing glass, and collaborated with artists to create artworks that push the boundaries of the medium. The full scope of the studio's output is captured in a thorough but concise retrospective exhibition, Judson Studios: Stained Glass From Gothic to Street Style, on view through September at Glendale's Forest Lawn Museum, itself home to one of the largest stained glass collections in the United States.