Welch Allyn Combined Set 3.5V Halogen HPX Streak Retinoscope Ophthalmoscope

2.8X the brightness and superior streak quality versus standard retinoscopes Superior streak quality enables easier and quicker refractions Optional crossed-linear polarizing filter removes 99% of glare from trial lenses External focusing sleeve offers continuous rotation Sealed optics keep dust out and optics clean for a more effective exam Fits all Welch Allyn 3.5 V power sources Halogen HPX (High Pressure Xenon) lamp illumination for true tissue color and long-lasting performance. 28 focusing lenses with a range of -25 to +40 diopters. Filters: cross-linear polarising, red-free and cobalt blue. Apertures: micro-spot, small spot large spot, slit and fixation aperture. Smooth, non-abrasive knurled finished rechargeable Nickel-Cadmium handle that can also be converted for use with standard C-cell batteries.