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In the eyewear industry, the Manual Refractor has always been an indispensable classic tool in professional optometry. Although with the development of technology, automated equipment has been continuously innovated, but the manual refractor is still widely used in optometry rooms with its high precision and reliability. What is a Manual Refractor? A Manual Refractor is a device designed for optometry, mainly used to evaluate vision and refractive status. Unlike modern automated optometry instruments, manual refractors are usually manually adjusted and operated by optometrists to help patients find the best degree of vision correction by replacing different lenses and test charts. Working PrincipleThe core principle of the manual refractor is to check the refraction of the eye by adjusting spherical lenses...

Wide compatibility: This all-in-one eye chart is designed to work with all kinds of screens, without the need to connect to a computer. Its compact structure makes installation easier and is compatible with all types of monitors. (With HDMI interface) Plug and Play: Smart calibration technology ensures compatibility with any monitor or TV, providing multiple chart functions for a seamless testing experience. Comprehensive test: Covers Ishihara test, cross cylinder, red-green balance, fixation, astigmatism, cross grid, coincidence, Schuber, Voss 4-point, red-green board, traffic light, etc. Supports continuous testing within a distance of 1m to 7m, randomly arranges the vision chart, provides imperial or metric options, and has randomization and mirroring functions. RF Wireless Remote Control: This compact remote control supports one-handed...