Illuminate and view parts of the eye such as the cornea and retina with the VIO-20. This head mounted Binocular Indirect ophthalmoscope is designed to be used by trained personnel. This device uses halogen illumination and a wired interface. ID 20 RIGHT PRODUCTS 800pxFeatures Include: Very light weight, very comfortable All pupil size future Clear view for natural observation Sealed optical system Brilliant halogen illumination Filter selection green and cobalt blue Interpupillary distance adjustable from 50-75mm