Patented Welch Allyn Coaxial Vision optics, combined with 68 lenses in single-diopter steps for extra precision. Two unique filter selections provide optimum light levels for all types of eye exams.

Product Features:

• Halogen HPX lamp illumination for true tissue color
• 18 unique aperture/filter combinations for greater versatility
• Opacity setting filter aids easy eye entry with the brightest Halogen HPX light
• Neutral density filter allows for entering healthy eyes without unwanted reflex
• 68 lenses in single-diopter steps for precise resolution (+38 to -30)
• Compatible with all existing Welch Allyn 3.5 V power sources
• "Flat-top" design