With 28 refractive lenses!
This standard ophthalmoscope head uses halogen light for true tissue color and consistent, long-lasting illumination. Features six apertures for generalist use; includes micro, small and large spot sizes, fixation target, slit aperture and red-free filter. 28 focusing lenses have a range of -25 to +40 diopters. Rubber brow rest prevents scratching of eyeglasses. Weighs 0.16 lbs.