In the conventional refraction, the patient answers the operator’s questions. According to their answers, the operator performs subjective refraction such as refining refractive errors (sphere, cylinder, prism, and such) and proceeding to the next test. In this system, the patient responds to refraction questions by themselves using the Joystick Controller in response to the voice guide from the computer.The system application enables subjective refraction according to patient operation to determine the full correction.
An electrically-powered ophthalmic device intended to be placed in front of a patient's eyes to assist with measuring the refractive error of the eye (the inaccuracies of focusing light upon the retina) during an examination, typically to determine a patient's prescription for glasses. Also known as an automated or digital refractor, it typically consists of two mounted disk-like housings (head) which contain lenses of different characteristics. The optometrist changes the lenses and other settings via an electrical control unit, while asking the patient to read an eye chart and provide subjective feedback on which settings give best vision.
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