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Welch Allyn 11720 3.5v
Coaxial Ophthalmoscope

The Welch Allyn 11720 Coaxial Ophthalmoscope has 28 lenses from -25 to +40 diopters. Cross-linear Polarization, Coaxial Optics, and HPX Halogen illumination. The 11720 is Welch Allyn's most popular ophthalmoscope. This instrument has a separate switch for Crossed Linear Polarization, and Red-Free Filter, which provides multiple aperture combinations.