Makes refractions easier than ever by producing one of the brightest, sharpest, and cleanest streaks available. Provides 2.8x the brightness of Welch Allyn standard retinoscopes. Superior streak quality 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. External focusing sleeve improves comfort and maneuverability. Sealed optics keep the lenses cleaner for more effective exams. Fits all Welch Allyn 3.5V power sources. For those preferring a spot retinoscope, the streak retinoscope converts to a spot retinoscope by simply replacing the streak lamp with a spot lamp.