Choice of illumination. Choose between 600 lux of brilliant halogen illumination or the new led streak retinoscope. Whichever you choose, the professional guarantees you enough light to refract even the most difficult eyes. New led professional streak retinoscope gives you better contrast, image quality, and longer battery life. Neutralization check (patented). The only retinoscope allows rapid confirmation of neutralization. You can change the beam from divergent to convergent enabling you to cross-check the accuracy of the neutral point, guaranteeing the assessment is correct every time. Precision magnetic control (patented). Improved 360º access to a single control for both rotation and convergence adjustments. The precision movements are achieved by the use of rare-earth magnet technology. Two-position aperture. A simple finger movement allows a choice of 4mm or 1.7mm aperture to optimize the brightness or resolution of the retinal reflex.