Vision measurement tool: This eye chart is designed to measure vision and detect various vision issues such as astigmatism, nearsightedness, farsightedness, and color vision deficiencies. Uniform lighting: Constructed with a high-strength shatter-resistant panel and crystal LED beads for consistent, glare-free illumination, enhancing visibility during tests. Durable print quality: The text is printed using advanced inkjet technology, ensuring clarity and resistance to fading, making it ideal for long-term use. The frosted panel is also easy to clean. Adjustable settings: Easily modify brightness and illumination using the remote control for optimal visibility under different lighting conditions. Designed for low power consumption. 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!