Model W11710 - Welch Allyn 11710 3.5V Standard Ophthalmoscope Head

Uses halogen light for true tissue colour and consistent, long-lasting illumination. Versatile and reliable at an economical price.  Halogen light for true tissue colour and consistent, long-lasting illumination,  6 apertures for generalist use: micro, small and large spot sizes, fixation target, slit aperture and red-free filter,  28 focusing lenses with a range of -25 to +40 diopters,  Rubber brow rest prevents the scratching of eyeglasses