This hand-held, direct illuminating ophthalmoscope from Welch Allyn incorporates an innovative and patented new optical design called Axial PointSource Optics. This technology allows the user of the PanOptic to more easily enter small pupils and provides a field of view of the fundus that's five times larger than ever before achieved with a standard ophthalmoscope in an undilated eye (25° field of view). Model 11810 features a half-moon aperture (which provides a combination of depth perception and field of view. Allows you to work six inches from the patient's eye for improved comfort. Compatible with Welch Allyn 3.5V power source handles. Does Not Include Handle.
Allows you to see much more fundus than with the traditional ophthalmoscope, I love it.