Proximity Chart Visual Acuity Chart Vision Tester E Eye Test Chart Compatible With M-dical Use Optical Store 40JEOOTDTYChunds: 100% Brand New And High Quality It is made of durable plastic with matte finish to avoid the reflective and glaring effect. The vision activity instrument is more scientific ideal for use with patients who are illiterate or do not know the Roman alphabet or cannot speak, students, optometrists, offices and schools. Widely used to measure visual acuity by determining the clarity of detailed distance vision that a person may discriminate. Check your level with eight lines or the letter "E" pointing in different directions on green and red bars. The 7.75x5.78 inch eye chart can be used with an illuminated eye test office or on a wall with the required 10 meters from the viewer for an eye exam. With magnetic, it is easy to change the vision chart, small size, easy to carry. Specification: Material: Plastic Size: 19.7x14.7cm/ 7.75x5.78 inPackage Included: 1x Graph Focus Vision TesterNote: Please allow 1-3cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.