Superior illumination, the right design for accurate refraction. 3.5v Coaxial Ophthalmoscope:-. Coaxial Ophthalmoscope head including Lamp. User Manual for Streak and Ophthalmoscope. The patented Welch Allyn Coaxial Vision System facilitates ophthalmoscopy by enabling easier entry into the eye, a larger field of view, and reduced glare compared to standard ophthalmoscopes.
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