Welch Allyn 3.5V Standard Ophthalmoscope Head (11710) with Halogen Lamp

Features:-
Halogen Light provides true tissue color.
6 apertures for generalist use: small, micro, and large spot sizes, fixation target,
slit aperture, and red-free filter.
Sealed optics keep out dust and dirt.
Rubber brow rest prevents scratching of eyeglasses.
28 focusing lenses with a range of -25 to +40 diopters.