In its natural form, healthy doses of blue light from the sun act to regulate the body's circadian rhythm and keep energy levels and emotional moods on an upswing. Yet overexposure to artificial blue light is a modern-day threat in our high-tech lives. At Berryessa Optometry, located in the heart of Silicon Valley, blue light is an occupational hazard for many local patients, and BluTech Lenses offer an effective solution to provide comfortable, safe vision.