Patented new Axial PointScourceâ„¢ Optics. Illumination system converges the light to a point at the cornea, allowing easy entry into small, undilated pupils. The illumination pathway then diverges to the retina, illuminating a very wide area of the fundus. Viewing system enables the operator to view the illuminated area on virtually the same axis, creating the widest field-of-view attainable. Provides a five-times larger view of the fundus than every before achieved with a standard ophthalmoscope in an undilated eye. Increases magnification by 26% over a standard ophthalmoscope. Patented Glare Extinguishment System prevents interference from unwanted glare and reflections. Works with all existing Welch Allyn 3.5v power sources (battery handle or- Accessories: Corneal Lens (US Only) Stock Item