One of a kind, Huvitz Auto Lensmeter HLM-9000 measures the harmful effects of LED screens by utilizing the Blue Light Filtration Measurement function. Increase total practice efficiency and enhance the total experience with the HLM-9000, using Hartmann Sensor Wavefront Analysis Technology to maximize accuracy in multi-focal & high curved lenses. Other features include Wireless Communication, full compatibility with all EMR Systems and Full Three Year Warranty.