In trail running, vision is part of performance. Reading the trail, spotting changes in terrain, adjusting stride, and reacting to shifting conditions all depend on seeing clearly and quickly. For Toni McCann, trail runner and adidas Sport Eyewear ambassador, that connection is immediate. “Your vision is one of the main tools you have,” McCann says. “You need it to read the terrain, choose your line, adjust your pace, and anticipate what’s ahead. When you can see clearly, you move more fluidly, more relaxed, and more precisely.” But for McCann, the role of eyewear goes beyond pure function. The right eyewear is just as key. “Seeing well also means feeling more present and connected to your surroundings,” she says. “And that presence, during a race, is essential for me.” This blend of technical performance and everyday usability is at the center of the adidas Sport Eyewear Spring/Summer 2026 collection .…