One-hand control of the instrument. Ergonomic design offers flexibility while examining. Suitable for large as well as small or undilated pupils. 7 apertures with separate red-free filter. Ergonomic design fits the orbita comfortably, and blocks out ambient light.Complete range of Handles with multiple charging options available. Precision HEINE optics and bright, homogeneous illumination through Xenon Halogen Technology produce accurate, high resolution views. Ensuring a precise diagnosis and the best possible rendering of red colours. No stray light due to the recessed, multi-coated viewing window – for a safer diagnosis. Exclusive aspherical optical system (AOS) redirects corneal reflections away from the examiner‘s path of sight providing a crisp, clear view of the fundus. Eliminates the need for filters and other systems that reduce resolution. The BETA 200 S accomodates higher refractive errors with 74 single-diopter steps on the lens wheel.