Welch Allyn Ophthalmoscope Head Coaxial Coaxial Model # 11720
Welch Allyn Ophthalmoscope Head Coaxial Coaxial  :  The Welch Allyn Ophthalmoscope head provides shadow-free spot viewing and includes a cobalt blue filter to detect corneal abrasions.Unit features include:3.5V halogen light18 unique aperture/filter combinations for greater versatility28 lenses (-25 to +40 diopters)Illuminated lens dialRed-free filter may be used with any aperture