MULTIFUNCTIONAL VISION TEST CHART: equipped with red and green color bars and astigmatism vision marks, it can not only perform routine vision tests, but also accurately screen astigmatism, myopia, hyperopia and color vision problems VISION CHART LIGHT BOX: built-in LED light, uniform and constant light pressure without flicker, no reflection, to ensure the accuracy of vision test, stable brightness without hurting the eyes, long-lasting and reliable lighting STURDY STRUCTURE: made of acrylic and aluminum alloy materials, the acrylic panel has excellent impact resistance and light transmittance to ensure clear presentation of vision chart writing; the aluminum alloy frame has high strength and lightness to ensure that the light box is not easy to deform or fall off during long-term use APPLICABLE SCENARIOS: This light box performs well in scenarios such as optical store testing and school vision census. The wall-mounted design can be flexibly installed in classrooms, training rooms, living rooms and other spaces Service: We place great emphasis on our customers' shopping experience. If you have any questions, please feel free to contact us; we will respond to you within 24 hours!