The Welch Allyn Streak Retinoscope makes refractions easier than ever by producing one of the brightest, sharpest, and cleanest streaks available. It provides 2.8X the brightness of Welch Allyn's standard retinoscopes. Enables easier and quicker refractions-even in patients with small pupils. Crossed linear polarizing filter eliminates bothersome glare from trial lenses, helping you perform a more precise exam. The external focusing sleeve improves comfort and maneuverability. Sealed optics keep the lenses cleaner.