The LCD vision chart is mainly divided into the following categories based on its function and form:
1. Computer based LCD vision chart: It is in a vertical form and usually has an LCD display screen and a large base, suitable for use in professional places such as ophthalmic hospitals and clinics.
2. Handheld LCD vision meter: With clear imaging, accurate calibration, and convenient operation, it is suitable for use in various ophthalmic medical institutions and examination vehicles.
3. Mobile LCD vision chart: suitable for use in various places and has the characteristics of easy portability and operation.
4. Electronic vision chart: Adopting digital display and human-computer interaction, it has strong functions and can playback data, suitable for use in professional places such as ophthalmic hospitals and clinics.
5. Intelligent glasses: capable of night vision, magnification, focusing, color adjustment, contrast, and other functions, suitable for people with visual impairments and those facing computer screens for a long time.